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  • Regular price $119.00
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The BOYA BY-WM4 Pro K2 Dual-Channel Digital Wireless Microphone is designed for videographers on a limited budget and video hobbyists, BY-WM4 PRO system is a new generation 2.4 GHz wireless microphone, dual-Channel for capturing audio with dual subjects to your smartphones, tablets, DSLR cameras, consumer camcorders, PCs etc.

 It’s a compact and extraordinarily easy-to-use wireless microphone system for recording crisp and clear speech, and interviews. Omnidirectional lavalier mic included is suitable for performers who which to exhibit freedom of movement in their visual recordings. Additionally, the system offers a up to 60m (197ft) line-of-sight operation range.

 BY-WM4 Pro-K2 consists of two compact body-pack transmitters (TX4 Pro), a portable receiver(RX4 Pro), a Lavalier/lapel microphone, two pieces of omnidirectional lavalier microphones, a 3.5mm TRRS audio cable and a 3.5mm TRS audio cable, which provides immediate out-of-the-box operability for anyone, making it ideal for video, podcast, and mobile journalism applications.

The receiver is built with 3.5mm mic and 3.5mm headphone output jacks. The bodypack transmitter includes a MIC jack and LINE IN jack.


  • Dual-Channel Wireless Receiver
  • Digital 2.4 GHz Frequency Band

  • Super-clear recording sound

  • Compatible with most of Audio / Video equipments, such as Smartphone, tablet, DSLR, small recorder, Audio Recorder, PC etc.

  • Headphone connector for real-time monitor

  • Lightweight and compact for easy carrying

  • Easy to use

  • Omnidirectional lavalier microphone

  • Hard case included

  • Standard camera shoe mount and clip included

  • Up to 60m (197ft) operation range (without obstacle)

  • Power supplied by two AAA batteries for transmitter and receiver






 BY-WM4 Pro K2

 RF Modulation

 GFSK (Gauss frequency Shift Keying)

 Frequency band

 2.4GHz (2405-2478MHz)

 Frequency response



 84dB or more


 0.05% or less (32Ω,1 KHz,65mW output)

 RF output level


 Earphone output level


 Reception sensitivity

 -90dB +/- 3dB / 0dB=1V/Pa, 1kHz

 Audio input connector

 3.5mm mini jack

 Operation range

 60m (197ft) (without obstacle)

 Power requirements

 3V DC (Two AAA size batteries)

 Consumption power

  •  Transmitter: 3V/70mA

  •  Receiver:3V/70mA


  • Transmitter: 45 x 70 x 35 mm 

  • Receiver: 45 x 70 x 35 mm 


  • Transmitter: 47g 

  • Receiver: 47g 



2 x BOYA BY-WM4 Pro K2 Transmitter

1 x BOYA BY-WM4 Pro K2 Receiver

2 x Lavalier / Lapel Microphone 

1 x 3.5mm to TRS Audio Output Cable

1 x 3.5mm to TRRS Audio Output Cable

1 x Cold Shoe Mount

1 x Clip 

1 x Carry Case

1 x User Manual