BOYA BY-WM4 Pro-K2 Dual Channel Wireless Microphone




Colombo City (01-15) 1 - 2 Days (COD Available)

Colombo & Suburbs 2 - 3 Days (COD Available)

Island Wide 3 - 9 Days (Card & Bank Only)

Boya’s WM4 Pro is a low-cost transmitter set for recording sound during presentations, interviews and conversations. There are two versions of the WM4 Pro: K1 and K2. Currently you are watching the K2, which comes with two transmitters + lavaliere microphones. With the K1 you will receive one transmitter and a lavaliere microphone. The transmitter and receiver of the WM4 Pro are very compact and connect to each other on the 2.4 GHz frequency. You can easily connect the receiver to your smartphone, (DSLR) camera, PC, laptop or MacBook. Both a 3.5 mm TRS and TRRS cable are included. For devices without a 3.5 mm input, a Lightning adapter and a USB adapter are available. These are included with the optional accessories. The WM4 Pro is the successor to the WM4 and features a higher signal-to-noise ratio, which means you hear less background noise. In addition, the WM4 Pro is more compact than the WM4.

If you are looking for a basic station set for recording one or two voices, the WM4 Pro K1 and K2 are a good choice. Optionally, you can adjust the volume using the + and – buttons. You don’t have to set anything else and you can get started right away. The included windbreak reduces wind noise. The clip attaches the microphone capsule to clothing. The range between the transmitter(s) and receiver is up to 60 meters.

Package Included:
2x WM4 Pro transmitter
1x WM4 Pro receiver
2x Microphone with cable
2x Windscreen
2x Tie-pin clip
1x Cable for camera and computer
1x Cable for smartphone
1x Coldshoe holder with 1/4″ female thread
1x Hardcase
1x User Manual

SKU: PRO-000223 Categories: ,

Product Specifications

Weight 520 kg
Dimensions 180 × 190 × 50 mm


Product Conditions




06 Month Warranty

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
Consumption Power Receiver: 3V/70mA
Dimensions Receiver: 45x70x35mm (1.8*2.8*1.4 inches)
Dimensions Transmitter: 45x70x35mm (1.8*2.8*1.4 inches)
Weight Receiver: 47g (1.7 oz)
Weight Transmitter: 47g (1.7 oz)

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