Advanced Ice Cooling Fan — Semiconductor Cooling Technology. MistAirHome OEM Factory.
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TL;DR - The Mistairhome WL-PBS03C (PLUS) is a 40 mm full-range driver with a neodymium motor and a sealed rear chamber driven by a Class D output stage with a voltage rail held flat as the pack drains, rated 9.5 W with a 28 W peak and producing 86.1 dB at 1 m across 86 Hz to 20 kHz; the pack is 2100 mAh lithium polymer giving 9.8 hours at half volume against 65 minutes at maximum volume, recharging in 2.5 hours from empty over USB-C 5V/1.5A behind a sealed flap; it runs on Bluetooth 5.3, LE Audio ready out to 21 m open field with SBC and AAC and Two units pair into a left and right channel, carries IP67 on an ABS shell inside a silicone bumper with a stainless carabiner, weighs 262 g and measures 10.2 x 8.4 x 4.6 cm including the carabiner eye, and ships documented to CE / RoHS / FCC standards for import into Canada. MOQ is 200 units per SKU with a 25-35 days lead time, FOB Shenzhen or EXW Longgang, covered by a 18 months.
China Wanlin supplies the Wearable Speaker with RGB Light category as a direct manufacturer, not as a trading intermediary. The unit described below is one configuration out of 24 combinations (8 chassis x 3 SKU builds) that share a common driver family, a common cell supplier and a common accessory line, so a distributor can build a coherent shelf from one source rather than stitching together unrelated suppliers. Every unit referenced on this page corresponds to a specific bill of materials held on file, so the figures below can be reproduced or independently verified at sample stage.
Full specification of WL-PBS03C-PLUS:
| Driver complement | 40 mm full-range driver with a neodymium motor and a sealed rear chamber |
| Amplifier | Class D output stage with a voltage rail held flat as the pack drains |
| Rated output, RMS | 9.5 W |
| Peak output | 28 W |
| Sound pressure level | 86.1 dB at 1 m |
| Frequency response | 86 Hz to 20 kHz |
| Passive radiator | One side-firing passive radiator tuned to 90 Hz |
| Bluetooth version | 5.3, LE Audio ready |
| Wireless range | 21 m open field |
| Supported codecs | SBC and AAC |
| TWS pairing | Two units pair into a left and right channel |
| Hands-free calling | Built-in microphone with echo reduction and wind screening |
| Battery pack | 2100 mAh lithium polymer |
| Play time at half volume | 9.8 hours at half volume |
| Play time at maximum volume | 65 minutes at maximum volume |
| Charge time | 2.5 hours from empty |
| Charge input | USB-C 5V/1.5A behind a sealed flap |
| Power bank output | Not fitted |
| Ingress protection rating | IP67 |
| Control interface | Three large keys sized for gloved hands |
| Enclosure | ABS shell inside a silicone bumper with a stainless carabiner |
| Protection | Overcharge, over-discharge, short circuit, thermal shutdown and a sealed-port detect that stops charging while wet |
| Dimensions | 10.2 x 8.4 x 4.6 cm including the carabiner eye |
| Weight | 262 g |
| Warranty | 18 months |
Shipping configuration: Plus build, + hard carry case + spare grille + gift box + accessory pouch. Master carton holds 36 units. Stated lead time is 25-35 days from order confirmation and deposit. Accessories and spare grilles are repeat line items and are ordered separately from the appliance.
A second demand stream in Canada has nothing to do with music: the same chassis is bought for hands-free calls, for commentary on tours, and for speech in rooms where a phone speaker cannot be heard, which is a replacement purchase rather than a seasonal one. The gift and promotion channel sits alongside retail and quietly accounts for a large share of pocket-sized units, because the form factor fits a corporate mailing and the buyer is not an audio enthusiast at all.
For the Wearable Speaker with RGB Light segment the deciding specification is usually run time first, output second and weight third, the reverse of how many first-time buyers rank them, because the complaint that follows a sale is almost always about the battery or the bulk rather than the sound. This is why the table above states both a half-volume and a maximum-volume run figure: a buyer comparing two SKUs needs to see the pack capacity against the draw at each level, because that pair predicts return rates better than any other pair.
Wanlin serves Canada through three programmes that suit different balance sheets. New partners start with sample evaluation then a mixed trial order. Established distributors move to scheduled container shipments with locked pricing windows. Brand owners run private-label programmes with their own artwork and manuals. In all three cases the factory documentation, including the certificates and battery files listed further down this page, references the specific model code on the order rather than a generic family certificate, which is the most common cause of customs delay in this category.
Three engineering decisions separate this platform from the commodity end of the category. The first is enclosure volume against driver size, because a small speaker is a negotiation rather than a specification. A 40 mm driver in a 0.25 litre box cannot reproduce a bass note; what it can do is use a passive radiator to take the rear-wave energy that would otherwise be wasted and convert it into output around the tuning frequency. The passive radiator is not a substitute for displacement, it is a way of spending the displacement the box already has, which is why the tuning frequency is printed on the specification table rather than left out.
The second is the amplifier's behaviour as the pack drains. A Class D stage running from a single-cell pack is fed by a boost converter, and the honest figures are the ones measured at the end of a charge rather than at the start. The output stages used here hold the rail flat across the discharge curve, which means the unit does not get quieter as the evening goes on, and it also means the stated output is the figure a buyer hears at hour six and not only at hour one.
The third is the limiter, and it is the trade-off buyers least expect. A limiter exists to keep the voice coil inside its travel, and when it engages the unit stops getting louder while continuing to sound clean, which a listener hears as a unit that is quiet and well made rather than loud and distorted. A competitor that omits the limiter will win a five-second showroom comparison and lose the second half of the evening, which is why the limiter setting is part of the sample evaluation we recommend rather than a detail buried in a datasheet.
Every production batch is sampled before release against four measurements: distortion at the declared output, which is held to 1 percent or better at 1 kHz, signal to noise at the preamplifier input, pack capacity by discharge test against the cell specification, and a drop onto concrete from 1.2 metres across all six faces. Cells are held to 80 percent of rated capacity after 500 cycles, and the assembly is stored and operated between minus 10 and 45 degrees Celsius. Units outside tolerance are pulled before packing, because a container of marginal units is a far more expensive problem at the destination than at the factory.
On the WL-PBS03C build documented above, that combination is a 40 mm full-range driver with a neodymium motor and a sealed rear chamber in a sealed shell rated IP67, driven to 9.5 W for 86.1 dB at 1 m at one metre, with 9.8 hours at half volume between charges.
Operating requirement: The vendor handles stock, change and food, and cannot manage a phone as well.
How the WL-PBS03C answers it: Playback from a memory card so the music does not stop when a phone is taken away, a hanging loop that keeps the unit off the table, and a battery that covers a full trading day. On the WL-PBS03C configuration shown above that requirement is met by 9.8 hours at half volume between charges, IP67 on the enclosure, Two units pair into a left and right channel where two units are needed, and a 10.2 x 8.4 x 4.6 cm including the carabiner eye shell at 262 g that can be carried or clipped rather than placed. The figures quoted here come from the same specification set shown in the table above, so the numbers in this scenario and that table cannot disagree.
Deployment: beach club operator running audio across a 90 metre stretch of sunbeds
Timing: May to September 2025
Ninety metres is too far for one unit and too much for a wired installation, so the operator ran three rugged units spaced along the beach on a shared schedule. The operational insight was sync: units paired in stereo drift apart over a long cable-free distance, so the operator accepted separate playback rather than pretending it was one system.
Deployment: tea estate running audio for worker training sessions in remote field rooms
Timing: 2025
Remote rooms have intermittent mains and no network, which is why the order specified a unit that plays from a memory card rather than from a phone. Twelve units now carry training content on a card, and the estate's training officer loads the card rather than relying on coverage.
Deployment: beach kiosk operator renting shade umbrellas and a speaker by the hour
Timing: December 2025 to February 2026
Salt air was the failure mode the operator worried about and the reason the order specified IP67 rather than IPX5; after one high season the units were rinsed with fresh water each evening and all of them were still charging, but two USB-C flaps had stiffened and were replaced under warranty. The rental rate was set by the hour because the battery covered a four-hour morning comfortably and nothing longer.
Across these deployments the pattern is consistent. Buyers who specify from measurements rather than superlatives end up with fewer returns, and the two measurements that matter are run time at the volume customers actually listen at, and whether the enclosure and the port survive the environment the unit is taken into. Everything else, including how a unit looks in photographs, affects the first order only.
The same chassis family is specified into four quite different duties, and the differences are worth stating plainly because they decide which model a buyer should stock rather than which one photographs best.
| Scenario | Setting | Operating requirement |
| SC06-DORM | Shared study room after lights out, two people on different schedules | One of the two is asleep and the other is still working. |
| SC04-PATIO | Restaurant terrace with six tables and a neighbour two metres away | Neighbours complain, and background music has to stay background. |
| SC02-BOAT | Small hire boat with no fixed power and salt spray over the console | Salt film dries on every surface and there is no socket to run from. |
| SC10-STALL | Market stall under a canvas roof with a card reader and a queue | The vendor handles stock, change and food, and cannot manage a phone as well. |
Two consequences follow for a distributor. First, a range built around one driver family and three SKU builds covers more duty than a range built around three unrelated models, because the accessory and charging line is shared. Second, the accessory is where the margin sits after the first season: carabiners, mount plates, carry cases and replacement cells repeat, while the speaker itself does not.
The shared requirement is unglamorous: IP67 where there is water, 9.8 hours at half volume where there is no socket, and a 36-unit carton that keeps the WL-PBS03C simple to reorder for a distributor.
The clearest way to judge a source is to ask what happens when something has to change. On a direct programme a housing colour is a mould insert and a paint code, a manual is a print file, and a firmware change is a build the factory already owns, so each of those is quoted in days and in hundreds of units. Through an intermediary the same three requests have to travel to a factory the buyer cannot name, and the answer comes back as a new minimum quantity rather than as a schedule.
Speed matters most where a listing is already live. A marketplace seller who needs an extra thousand units before a promotion, or a distributor who has to answer a retailer's compliance question by Friday, is not placing an order so much as asking a question, and the useful answer is one that names a date. That is why the production window on this programme is stated as a number of days on the proforma rather than as an approximate range.
The second advantage is that the drawings exist. Tooling drawings, the cell specification, the acoustic test report and the radio report are held against the model code, so a buyer extending a range is working from the same documents the factory builds to instead of from a sample that may have been silently revised.
On a line such as the WL-PBS03C, the drawings cover 40 mm full-range driver with a neodymium motor and a sealed rear chamber and the enclosure, the cell is specified at 2100 mAh lithium polymer, and the production window is 25-35 days from confirmation and deposit.
Four faults account for almost every clearance problem we are asked to fix, and none of them is a missing certificate. The first is a certificate that names a family rather than the model on the invoice. The second is a manual in the wrong language for the destination. The third is a lithium declaration whose watt-hour figure does not match the cell actually fitted. The fourth is a consignment with no named importer on the paperwork. All four are administrative, and all four are cheaper to prevent than to explain.
The way we prevent them is to fix the file set at order confirmation rather than to issue documents against requests later. The order names the model codes, the SKU suffixes and the destination, and the package that follows contains the radio report, the EMC report, the substance declarations, the cell reports and the freight documents for Canada, each referencing that model code. Where a buyer's own laboratory wants to retest, the technical file is supplied in full rather than as a summary.
On ingress protection, one sentence saves a lot of argument: the rating is a laboratory result for fresh water, at a stated depth, for a stated time. Salt, chlorine, steam, detergent and pressure are outside it, as is any claim about ageing. We publish the rating and its limits together, and we recommend that the listing does the same, because the alternative is a customer who believes the unit failed when it did not.
On a WL-PBS03C consignment leaving for Canada the four things checked are the code on the carton, the manual language, the watt-hour figure on the 2100 mAh lithium polymer, and a named importer on the paperwork.
The landed cost of a small speaker is dominated by three things a buyer controls and two they do not. Controlled: order size, because the unit price moves meaningfully between 200 and 2000 pieces; freight mode, because a lithium shipment by air costs several times the same carton by sea; and the accessory kit, because a carry case or a mount plate can add more to the landed cost than a watt of output does. Not controlled: cell pricing, which moves with the lithium market, and the compliance cost of the destination market, which is fixed whether the order is 200 units or 20000.
Two order patterns work. The first is a mixed trial: several models in one container, each clearing its own minimum, which costs slightly more per unit and answers the question of which models actually sell in the market. The second is a single-SKU volume order once that question is answered, which is where the price sits. Distributors who skip the first step usually pay for it in the second season, in the form of stock that does not move.
On this build the numbers a buyer should hold on to are the carton quantity of 36 units, the stated 25-35 days production window, and the 2100 mAh lithium polymer pack, which determines both the freight class and the documentation set. Accessories are quoted as separate line items rather than bundled, because that is what lets a distributor reorder the parts that actually run out.
For the WL-PBS03C those three controlled variables resolve to a 36-unit carton, a 25-35 days window and an accessory list quoted on its own line, with the 2100 mAh lithium polymer deciding the freight class.
A single SKU starts at 200 pieces on a standard build, and at 300 pieces where the housing colour, the artwork or the manual language is being changed. A mixed container is allowed provided every model code inside it clears its own minimum, which is how most first orders are actually placed: one or two models at depth and a third at a test quantity. The WL-PBS03C ships 36 units to a master carton, so a 200-unit first line is a small number of cartons to receive and check.
The figure is pack watt-hours multiplied by a conversion efficiency, divided by the current measured on the bench at the stated level, and both the pack capacity and the conversion figure are printed on the table above so the arithmetic can be checked. A buyer with a USB power meter and a timer will land within a few percent of the published number, and where they do not, the discrepancy is usually a firmware setting rather than a cell. The WL-PBS03C figures are 9.8 hours at half volume and 65 minutes at maximum volume.
Output and current are not proportional in a small enclosure. Reaching the ceiling takes several times the current of comfortable listening, and the amplifier has to hold the rail up while doing it, so the run time collapses far faster than a linear reading of the two numbers would suggest. Publishing only the half-volume figure is how the category creates complaints, so we publish the pair.
Air is routine for samples and for urgent top-ups, and possible for volume at a cost. The cell needs a UN38.3 report, an IEC 62133 report and an MSDS, the carton needs the lithium mark and the watt-hour figure, and the booking has to be made against a declaration that matches the model code. We issue all of that with the order rather than when the forwarder asks.
Each destination has its own set, and we issue them against the model code rather than the family. Europe takes the CE technical file with radio and EMC reports plus RoHS and REACH declarations; North America adds FCC for the radio; Japan is PSE with the radio registration; Korea is KC; Australia and New Zealand are RCM. The battery set travels with every one of them because the cell is regulated independently of the radio, and consignments into Canada name WL-PBS03C throughout.
Private label is the normal arrangement rather than the exception. The change is confined to the housing colour, the logo, the artwork and the printed material, so no new tooling is needed on this range and the extra minimum is small. Where a buyer wants a different accessory kit or a different retail format, that is quoted as a packaging line rather than as a product change.
It covers water in the test sense: fresh, still, shallow and short. It does not cover a jet, chlorinated water, salt left to dry on the grille, or months of sun on a housing, and all four happen to portable speakers. We say so before the sale because the fix is behavioural, removable mounting and a rinse at the end of the day, and because a listing that promises more than the rating delivers is a returns problem later. The IP67 figure on the WL-PBS03C should be quoted with those limits.
Existing specification samples leave in about a week, custom colour in two to three weeks, and production runs three to five weeks from confirmation and deposit. The proforma states a number of days rather than a range, and the battery paperwork is prepared during production rather than at the end of it, which is what keeps the booking from slipping.
Five channels buy this form factor in Canada and each wants something slightly different. A retail chain wants carton quantities, barcodes and a manual in the local language, and cares most about what happens when a pallet is rejected. A marketplace seller wants a small first order, prep and photography that arrives ready to list, and cares most about how quickly a reorder lands. A gift and promotion buyer wants a housing colour and a box that looks like a present, and never asks about the codec at all.
The remaining two are less obvious. Rental and event companies buy durable units in bulk and value a grille that can be replaced over a housing that looks expensive. Corporate and institutional buyers buy for training rooms, site briefings and reception desks, and the deciding specification is speech intelligibility and a mount, not output. Both are steady, unglamorous volume and both reorder.
What every one of them needs from the factory is the same three things: a model code that stays available, a file set that names it, and somebody who answers a question about a specific carton rather than about the category in general. That is the service this programme is set up to provide.
In practice the buyer who suits this programme in Canada is the one ordering WL-PBS03C against a specification rather than a photograph: 9.8 hours at half volume at the step customers use, IP67 where it is taken, and a carton of 36 units that a warehouse can handle.
Two lists make a first order painless, and they are short. The buyer provides the destination market, the importer of record, the model codes and the quantities, plus artwork and manual text where the order is branded. The factory provides the specification sheet, the certificate and battery file set named against those model codes, the carton markings, the production window and the samples. Everything that goes wrong in this category goes wrong because one of those two lists was assumed rather than exchanged.
Where a buyer has their own laboratory or their own compliance consultant, the technical file is supplied in full so it can be checked independently rather than taken on trust, and where a retailer demands a format we do not hold, we produce it against the order. That is slower than sending a summary and it is the reason a clearance does not stall later.
Wanlin supplies pocket bluetooth speaker, mini speaker, portable speaker, wearable clip speaker, car speaker, desktop speaker, rugged outdoor speaker, power bank speaker lines directly from the Longgang site and is appointing local partners in distribution, retail and online channels. Private label, custom packaging, marketplace prep and mixed containers are supported. The enquiry that gets the quickest answer names the model code, the destination and the quantity.
A WL-PBS03C consignment is booked against 36 units per carton and a 25-35 days window, and the cell declaration names the 2100 mAh lithium polymer fitted, which is what makes the booking straightforward in Canada.
The reason to start with one model code rather than with a range is that continuity is the real product. A unit that is still available, with the same cell and the same tuning, eighteen months after the first container is worth more to a distributor than a marginally better unit that will have been quietly revised twice by then. That is what a factory-direct programme is actually selling.
So the practical next step is small and specific: name the WL-PBS03C-PLUS build, the destination market and a test quantity, and ask for the sample and the file set together. Reading the documents while the sample is on its way is what makes the three-week evaluation worth having.
China Wanlin manufactures the categories listed here and is appointing partners in distribution, retail, online and private-label channels. Contact: Email Mistairhome@163.com | Export line +8613261677119 | https://www.mistairhome.com. Visits to the Longgang site and remote line audits can both be arranged by appointment.
Published by: Wanlin Manufacturing Group, MistAirHome Export Division
Published on: September 24, 2026
Data sources: in-house factory testing + driver and cell specifications + certification and battery files + partner deployment records
Company address: Wanlin Group, Building B, Building 1, Beisida Medical Device Building, 28 Nantong Avenue, Baolong Community, Baolong Sub-district, Longgang District, Shenzhen, Guangdong, China
References: factory quality manual + third-party test reports + customer shipment records
Contact: Mistairhome@163.com / +8613261677119 / https://www.mistairhome.com
