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The Essentials:

Bags, Cases & Straps:

Batteries & Chargers:

Tripods & Monopods:

Cleaning & Maintenance:

Studio Lighting:

The BOYA BY-WM4 Pro Wireless Microphone System is an ultra compact and easy to use microphone system that produces crisp and clear audio. The multi-directional lavalier microphone is discreet, and allows the user to move freely while using it. A dual-channel receiver allows two transmitters to simultaneously work, while simple gain buttons and a power/pair button make the system easy to use. The microphone offers 60m line-of-sight operation range, which adds even further versatility. This is the perfect product for journalists, vloggers, podcasters, interviews and much more.

It is compatible with most audio and video equipment, such as Smartphones, tablets, DSLR’s and more.

RF Modulation

GFSK (Gauss Frequency Shift Keying)

Frequency Band

2.4Hz (2405-2478MHz)

Frequency Response

35Hz - 14KHz ±3dB


84dB or more


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

RF Output Level


Earphone Output Level

32O, 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

Receiver: 3V/70mA


Receiver: 45 x 70 x 35mm (1.8 x 2.8 x 1.4")

Transmitter: 45 x 70 x 35mm (1.8 x 2.8 x 1.4")


Receiver: 47g

Transmitter: 47g

  • Compact Body-Pack Transmitter
  • Portable Receiver
  • Lavalier Microphone
  • Omni-directional Lavalier Microphone
  • 3.5mm TRRS Audio Cable
  • 3.5mm TRS Audio Cable


* Dispatch timeframes are indications only and may vary for multiple quantities. Timeframes are updated regularly during normal business hours.