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Boya BY-WM4 Pro K1 Wireless Microphone System

Wireless On a Budget

Designed for videographers on a limited budget and video hobbyists. The BY-WM4 PRO is a new generation 2.4 GHz wireless microphone. Complete with dual-Channel receiver, easy-to-use and compact design.

Wide Compatibility

With both TRS cable and TRRS output cable included, it can be used for Smartphones, Tablets, DSLR cameras, camcorders, audio recorders and computer streaming applications.

Excellent Range and Performance

With the transmitter and receiver each weighing only 47g (1.7 oz) and measuring 45 x 70 x 35mm (1.8 x 2.8 x 1.4"), the system still maintains the high signal-to-noise ratio above 84dB and low distortion rate below 0.05%.

High Quality Transmission

The system works at distances of up to 60m (197') operation range (line of sight), operating on the 2.4 GHz frequency band, offering flexibility and giving you a low-latency audio transmission with no video sync issues.


  • Digital 2.4 GHz Frequency Band
  • Super-clear recording sound
  • Compatible with smartphones, DSLR cameras, consumer camcorders, PCs 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 (197') operation range (without obstacle)
  • Power supplied by two AAA batteries for transmitter and receiver


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:  3V DC (Two AAA size batteries)
 Consumption power:  Transmitter: 3V/70mA
 Dimensions:  Receiver: 45x70x35mm (1.8*2.8*1.4 inches)
 Transmitter: 45x70x35mm (1.8*2.8*1.4 inches)
 Weight:  Receiver: 47g (1.7 oz)
 Transmitter: 47g (1.7 oz)


1  X Transmitter
1  X Receiver
1  X Lapel Microphone with Clip
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 Hard Case