BOYA BY-WM4 PRO-K5 Digital Wireless Omni Lavalier Microphone

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BOYA BY-WM4 PRO-K5 Digital Wireless Omni Lavalier Microphone System Description

The Boya BY-WM4 PRO-K5 is a compact, entry-level wireless lavalier microphone system offering an easy-to-use, cost-effective, and all-inclusive solution for recording one subject to your Android phone or similar USB Type-C mobile device. The system delivers improved sound quality over the built-in mics on cameras and mobile devices to supply clear, intelligible speech for journalists, YouTube/Instagram creators, TikTok personalities, vloggers, and more.

The package includes a clip-on omnidirectional lavalier mic and bodypack transmitter with a belt clip that allows your subject to move around hands-free in front of the camera for demonstrations, presentations, and performances. The ultracompact, dual-channel receiver offers a 200' line-of-sight maximum operating range and mounts to the USB-C connection on your mobile device, which also provides it with power.

The 3.5mm jack on the receiver lets you plug in headphones for monitoring while you're working on set. The transmitter is powered by two AAA batteries for up to 11.5 hours, and it is pre-paired with the receiver at the factory—just power up, plug the receiver into your device, and you're ready to go.

DIGITAL WIRELESS MICROPHONE-BY-WM4 Pro-K5 is a digital wireless microphone system(one transmitter + one receiver), ideal for vlogging, podcasts, live streaming, mobile journalism for TYPE-C devices. RELIABLE AUDIO -Features an upgraded RF Chipset that broadcasts on the open 2.4GHz frequency spectrum and wireless transmission up to 200' ft (60m). CONVENIENT -Listen to your audio in real time with the headphone input to ensure accurate sound recording. For more control, adjust the microphone volume to reduce time in post-production. LIGHTWEIGHT AND COMPACT SIZE - can be placed into your backpack, very convenient to carry around during traveling. Warranty: 1-YEAR BOYA Warranty.

BOYA BY-WM4 PRO-K5 Digital Wireless Omni Lavalier Microphone System comes with 1 year of service warranty.

BOYA BY-WM4 PRO-K5 Digital Wireless Omni Lavalier Microphone System Features

  1. Ideal for Tiktok, Youtube, vlogging, Facebook, podcast, mobile journalism, and more
  2. Digital 2.4GHz wireless system
  3. Ultracompact and miniature-size for the receiver
  4. Compatible with most Android devices and other Type-C devices
  5. Super-clear recording sound
  6. Omnidirectional lavalier microphone included
  7. Selectable stereo and mono mode
  8. Master volume control
  9. Up to 60m (197ft) operation range (without obstacles).
  10. Dual-Channel wireless receiver
  11. Monitoring sound by 3.5mm headphone output
  12. Hard case included.

BOYA BY-WM4 PRO-K5 Digital Wireless Omni Lavalier Microphone System Specifications

 RF Modulation:  GFSK (Gauss frequency Shift Keying)
 Frequency band:  2.4GHz (2405-2478MHz)
 Frequency response: 35Hz-14KHz±3dB
 Signal/Noise:  84dB or more
 Distortion:  0.05% or less (32Ω,1 KHz,65mW output)
 RF output level: 3mW
 Earphone output level:  32Ω,65mW
 Reception sensitivity: -90dB +/- 3dB / 0dB=1V/Pa, 1kHz
 Audio input connector:  3.5mm mini jack
 Operation range: 60m (197ft) (without obstacle)
 Power requirements: BY-WM4 PRO RXU: Supplied by USB Type-C device
 Plug: BY-WM4 PRO RXU: USB Type-C Connector
 Consumption power: 

Transmitter: 3V/70mA



Receiver: BY-WM4 PRO RXU: 82×30.7×12mm (3.2×1.2×0.5”)

Transmitter: 45x70x35mm (1.8*2.8*1.4 inches)


Receiver:BY-WM4 PRO RXD: 12g (0.4oz)

Transmitter: 47g (1.7 oz)

Easy-to-Use System with Lavalier Mic & Bodypack Transmitter

  • The clip-on lavalier microphone features an omnidirectional pickup pattern that helps to deliver consistent audio levels even when the subject turns away from the mic.
  • The mic plugs into the lightweight bodypack transmitter, which runs on two AAA batteries.
  • An LED indicator on the unit shows the power and low battery level.
  • Simply power up the receiver and transmitter to access reliable wireless audio functionality in an instant.

Ultracompact, Dual-Channel Receiver

  • The lightweight, ultra-compact receiver plugs directly into the USB Type-C port of your Android phone or mobile device.
  • The receiver's input gain can be adjusted to accommodate speakers at different volume levels.
  • The receiver features a 3.5mm headphone jack for monitoring.
  • For a two-person shoot, simply add another transmitter instead of buying a whole system. Since the BY-WM4 PRO RXU is a dual-channel receiver, it can simultaneously handle two TX4 Pro wireless transmitters (second transmitter available separately).
  • Up to 8 systems can operate simultaneously in the same location, but each system should be separated by at least 16.5' to avoid interference.


Finally, an easy way to send wireless sound direct to your Android phone or tablet. The tiny receiver just plugs discreetly into your device. The bodypack is tiny as well.


Why use an external camera and recorder when your Android device will do? Easily stream live to Facebook, Youtube, TikTok, and Instagram with crystal clear professional sound.


The system consists of a body-pack transmitter (TX4 Pro) with one omnidirectional lavalier microphone. The miniature receiver with a Type-c connector (BY-WM4 PRO RXU) plugs into your Android device. The ultracompact dual-channel receiver can allow users to work two transmitters at the same time.

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