Boya BY-WM4 Pro-K1

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The Boya BY-WM4 PRO 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 camera, camcorder, or 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 belt clip, allowing your subject to move around hands-free in front of the camera for demonstrations, presentations, interviews, and performances. The compact, dual-channel receiver offers a 200' line-of-sight maximum operating range and includes an attachment clip and a camera shoe mount for flexible mounting options.

Connecting cables for both your camera and smartphone are included, while the 3.5mm jack on the receiver lets you plug in headphones for monitoring while you're working on set. The transmitter and receiver are both powered by two AAA batteries for up to 11.5 hours and arrive pre-paired at the factory—just power up, plug the receiver into your camera or phone, and you're ready to go.
  • For Video, Vlogging, YouTube, Instagram
  • Bodypack Transmitter
  • Easy to Use, Plug & Play Operation
  • 3.5mm Cables for Camera & Mobile Device
  • 8 Systems at Once Max, Up to 200' Range
  • Omni Lavalier Mic
  • Compact Dual-Channel Receiver
  • Adjustable Gain, Headphone Monitoring
  • Runs up to 11.5 Hours on AAA Batteries

Product instruction

What's in the box?
  • Boya BY-WM4 Pro-K1
  • RX4 Pro Receiver
  • TX4 Pro Bodypack Transmitter
  • Omnidirectional Lavalier Microphone
  • Alligator-Style Lavalier Mic Clip
  • Foam Windscreen
  • Camera-Shoe Mount
  • 3.5mm TRS Cable for Cameras
  • 3.5mm TRRS Cable for Mobile Devices
Department Wireless Microphones / Systems
Wireless Transmission Digital 2.4 GHz
Max Operating Range 60 m (Line of Sight)
Max Systems per Setup 8
Included Transmitters 1 x Bodypack with Microphone
Outer Dimensions 17.2 x 11.6 x 5.5 cm
Weight 317 g