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Boya BY-WM4 Pro K5 Wireless Microphone System for Android and USB Type-C

Sound Direct to Your Phone or Tablet

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

Perfect for Live Streaming

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.

How it Works

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.


  • Digital 2.4GHz wireless system
  • Ultracompact and miniature-size for receiver
  • Compatible with most of Android devices and other Type-C devices 
  • Super-clear recording sound
  • Omnidirectional lavalier microphone included
  • Selectable stereo and mono mode
  • 3.5mm headphone jack
  • Master volume control
  • Up to 60m (197ft) operation range (without obstacles)


 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
 Dimensions:  Receiver: BY-WM4 PRO RXU: 82×30.7×12mm (3.2×1.2×0.5”)
 Transmitter: 45x70x35mm (1.8*2.8*1.4 inches)
 Weight:  Receiver:BY-WM4 PRO RXD: 12g (0.4oz)
 Transmitter: 47g (1.7 oz)


1 x BY-WM4 Pro Transmitter
1 x BY-WM4 RXD 2.4GHz Wireless Receiver for Android and Type-C Devices
1 x Wind Shield
1 x Lavalier/Lapel Microphone
1 x Carry Case
1 x Microphone Holder Clip

Boya BY-WM4 Pro K5