BOYA BY-WM4 Pro is available at Mascom International for KSh 12,000, a digital 2.4GHz wireless lavalier system with a body-pack transmitter, a camera-mount receiver and about 60 metres of line-of-sight range. Every unit is brand new and sealed. The BOYA BY-WM4 Pro pairs one TX4 Pro transmitter with one RX4 Pro receiver, and each runs on two AAA batteries for roughly 11.5 hours. The receiver has two 3.5mm outputs, one for audio out and one for headphone monitoring, so you hear what you record. You can see and test it at our shop in the Old Mutual Building on Kimathi Street, Nairobi CBD.
Built for journalists, wedding videographers, church media teams, lecturers and content creators across Kenya, the BOYA BY-WM4 Pro fixes the most common video problem: sound that is thin, echoey or buried in traffic. A camera's built-in microphone sits far from the speaker and picks up the whole room. With the lavalier clipped to a collar, the voice is captured a few centimetres from the mouth and sent to the camera without a cable. That matters for a field interview in Industrial Area, a sermon filmed from the back of a hall, or a cooking tutorial shot in a small apartment.
Where most Nairobi electronics shops sell unbranded wireless mics that hiss and drop out, Mascom International stocks the BOYA BY-WM4 Pro with honest specifications and after-sales support. Customers across Nairobi tell us the two cables in the box are the reason they choose it: one kit records on a DSLR in the morning and on a handset in the afternoon. Because the BOYA BY-WM4 Pro runs on AAA cells, a KPLC power cut never leaves it flat before a shoot. Visit the shop to test it, or order with pay-on-arrival delivery to any county.
Common Questions About the BOYA BY-WM4 Pro
How much is the BOYA BY-WM4 Pro wireless microphone in Kenya?
The BOYA BY-WM4 Pro costs KSh 12,000 brand new at Mascom International in Nairobi CBD. That price covers the transmitter, the camera-mount receiver, the lavalier microphone, both 3.5mm cables and the 6-month warranty. The transmitter and receiver each take two AAA batteries, so keep four on hand before your first shoot. Delivery is pay-on-arrival anywhere in Kenya. If you record mainly on a USB-C Android phone, the BOYA BY-WM4 Pro-K5 costs KSh 16,500, which is KSh 4,500 more.
Should I buy the BOYA BY-WM4 Pro or the BOYA BY-WM4 Pro-K5?
Choose the BOYA BY-WM4 Pro if you film mainly on a camera, and the BOYA BY-WM4 Pro-K5 if you film mainly on a USB-C phone. The BOYA BY-WM4 Pro uses a battery-powered receiver with 3.5mm outputs that sits on a camera's hot shoe. The BOYA BY-WM4 Pro-K5 uses a small USB-C receiver that plugs straight into the phone and draws power from it. Both share the same TX4 Pro transmitter and 60-metre range, but only the BOYA BY-WM4 Pro feeds a DSLR without an adapter.
Does the BOYA BY-WM4 Pro work during power cuts and in dusty Kenyan conditions?
Yes, the BOYA BY-WM4 Pro runs on AAA batteries, so a KPLC outage never stops a shoot. You need no socket or charging cable on location; spare cells from any supermarket or kiosk keep you going. A pair lasts about 11.5 hours in each unit. On dusty roads in Kajiado or Machakos, keep the receiver and transmitter in a pouch between takes and fit the foam windscreen to the lavalier, which also cuts wind noise on open ground.
Can I use the BOYA BY-WM4 Pro with my phone?
You can, using the 3.5mm TRRS cable included with the BOYA BY-WM4 Pro. Plug it into a phone with a headphone jack and the phone records the lavalier instead of its own microphone. Many newer phones have only a USB-C port, so they need a USB-C to 3.5mm adapter that supports microphone input; ask us to test yours in store. Creators who record TikTok and Instagram clips on a phone alone usually find the BOYA BY-WM4 Pro-K5 simpler because it plugs straight in.
What range does the BOYA BY-WM4 Pro reach?
The BOYA BY-WM4 Pro reaches about 60 metres with a clear line of sight between transmitter and receiver. Walls, crowds and bodies shorten that, as with any 2.4GHz system. For most real work, such as a speaker on a church stage with the camera at the back, or a reporter walking beside a guest along Moi Avenue, the signal stays steady well inside that figure. Keep the receiver facing the speaker and avoid placing it behind metal objects.
Is the BOYA BY-WM4 Pro good for wedding and event videography?
The BOYA BY-WM4 Pro suits wedding vows, speeches and church services because the transmitter clips onto the groom or the pastor and sends audio to the camera without a trailing cable. The receiver's headphone output lets you hear the feed live, so you catch a loose clip or rustling fabric before the moment passes. At Mascom International, we're seeing event videographers buy two kits, one per camera, so the couple and the officiant each wear their own microphone.
Does the BOYA BY-WM4 Pro hiss or pick up interference?
The BOYA BY-WM4 Pro has a signal-to-noise ratio of 84dB, so the voice sits well above the system's own background hiss. It transmits digitally between 2405 and 2478MHz, which avoids the crackle common with cheap analogue radio mics. Its frequency response of 35Hz to 14kHz covers the full range of normal speech. Crowded Wi-Fi spaces such as shopping malls can still shorten range, so do a short sound check in the venue before an important shoot.
Who should buy the BOYA BY-WM4 Pro, and who should skip it?
Buy the BOYA BY-WM4 Pro if you film one speaker at a time on a DSLR, mirrorless camera or camcorder and want a phone option as backup. Skip it if you need two voices on one recording, such as a podcast or a two-person interview; the BOYA BY-WM4 Pro-K6 handles that with two transmitters. Skip it as well if you record only on a USB-C Android phone, where the BOYA BY-WM4 Pro-K5 is the cleaner fit.
Technical Specifications
Core Function and Audio Performance
- Digital 2.4GHz wireless link on 2405-2478MHz — voice travels as data, so it stays free of the hiss heard on cheap analogue radio mics.
- Range of about 60 metres in open line of sight — enough to film a speaker across a hall, church or sports field.
- Omnidirectional lavalier microphone — picks up voice from any angle, so a turned head or slightly loose clip still sounds natural.
- Frequency response of 35Hz to 14kHz — covers the deep and bright parts of speech; music recording is better served by a studio mic.
- Signal-to-noise ratio of 84dB — the voice sits far above the system's own background noise, giving clean audio that needs little editing.
- Separate headphone output on the receiver — plug in earphones and hear exactly what reaches the camera while you film.
- Auto-scan channel selection, with BOYA rating the system for up to eight transmitters in one venue — several crews can work side by side.
Compatibility
- 3.5mm TRS cable for cameras — connects to the microphone input on DSLR, mirrorless and camcorder bodies from all major brands.
- 3.5mm TRRS cable for phones and tablets — links to any handset or tablet that still has a headphone jack.
- USB-C phones need a 3.5mm adapter with microphone support — not part of the kit, so bring your phone to test in store.
- Works with laptops and portable audio recorders that have a 3.5mm microphone input — useful for online lectures, voice-overs and meetings.
- Line output and headphone output are separate 3.5mm jacks — record and monitor at the same time without buying a splitter.
- No app or driver needed — the camera, phone or laptop treats the kit as an ordinary wired microphone, so setup takes a minute.
- Suits gimbals and phone rigs that carry an accessory shoe — the receiver sits on the rig while the TRRS cable runs to the handset.
Build and Power
- TX4 Pro body-pack transmitter weighs about 47g — light enough to clip on a belt or waistband for a full day.
- RX4 Pro receiver weighs about 47g and mounts on a camera hot shoe — it rides on top of the camera, out of your hands.
- Each unit runs on two AAA batteries — swap cells in seconds on location instead of waiting for a charge to finish.
- Battery life of about 11.5 hours per pair of cells — covers a long event day from morning preparation to the evening reception.
- Transmitter measures about 45 x 70 x 35mm — small enough to hide under a jacket or slip into a shirt pocket.
- 3.5mm microphone input on the transmitter — swap in a different lavalier or a headset mic if a job calls for one.
Inclusions
- One TX4 Pro transmitter and one RX4 Pro receiver — a complete single-speaker wireless kit that works straight from the box.
- One omnidirectional lavalier microphone with clip — attaches neatly to a collar, tie, lapel or blouse.
- Foam windscreen — softens breath pops and outdoor wind when you film interviews on open ground, rooftops or by the roadside.
- Camera shoe mount — holds the receiver firmly on top of a camera, cage or small rig, so both hands stay free for framing.
- 3.5mm TRS and TRRS cables — one for cameras and one for phones, both supplied in the box.
Package Contents
The BOYA BY-WM4 Pro arrives brand new in its sealed retail box with everything needed for camera and phone recording. Inside you will find the TX4 Pro body-pack transmitter, the RX4 Pro camera-mount receiver, an omnidirectional lavalier microphone with clip, a foam windscreen, a camera shoe mount, a 3.5mm TRS cable for cameras and a 3.5mm TRRS cable for phones. Ask our team about AAA batteries and USB-C adapters when you collect your kit.
Warranty
Mascom International backs the BOYA BY-WM4 Pro with a 6-month warranty covering manufacturing defects in the transmitter, receiver, microphone and cables under normal use. If a fault appears, bring the kit and your receipt to our Nairobi CBD service desk at the Old Mutual Building on Kimathi Street, where our team will assess and handle the claim.
Where to Buy the BOYA BY-WM4 Pro in Kenya
The BOYA BY-WM4 Pro is in stock at Mascom International, Old Mutual Building, First Floor Room 4, Kimathi Street, Nairobi CBD. We are open Monday through Saturday, 9:00 AM to 7:00 PM. Bring your own camera or phone and we will connect the kit so you can hear the difference before you pay. The system comes in black, and you can pay by M-Pesa or cash.
Reach our team for stock checks, advice or orders:
- Phone/WhatsApp: +254 708 852 521
- Email: info@mascomintl.com
- Website: www.mascomintl.com
We offer pay-on-arrival delivery to all 47 counties. Orders within Nairobi and its environs arrive the same day, while buyers in Nakuru, Eldoret, Kisumu, Mombasa and Nyeri receive their kit the next business day. Mandera, Wajir, Marsabit, Lamu, Tana River, and Turkana receive delivery within 2-3 business days.
Your purchase is backed by the 6-month warranty above. We publish honest specifications and accurate pricing, and our walk-in store gives you real after-sales support long after the shoot is done.
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