Name: BOYA BY-WM4 PRO-K3 Wireless Microphone Kit - Microphone System
Brand: BOYA

BOYA BY-WM4 PRO-K3 Wireless Microphone Kit is a compact lavalier microphone system designed for creators and professionals who need reliable RF wireless audio on the move.

The BY-WM4 PRO-K3 uses a condenser lavalier microphone that captures clear speech with a frequency response of 35–14,000 Hz, making it suitable for interviews, vlogging and presentations. Its RF wireless connectivity operates across 2405–2478 MHz and offers an effective working range of up to 15 m.

The kit features a rack-mount style receiver with a fixed antenna and a bodypack transmitter for convenient, hands-free operation. The receiver is compact (60 x 86 x 41 mm) and lightweight (152 g), while the transmitter measures 60 x 86 x 28 mm and weighs 136 g, so both components are easy to carry and mount.

For practical use the system includes a 3.5 mm input and ships with an audio cable and camera adapter, enabling direct connection to cameras, recorders and mobile devices. A microphone clip is supplied to secure the lavalier discreetly to clothing.

Battery life reaches up to 3 hours using two AA batteries (batteries not included), which makes the kit well suited for short shoots, run-and-gun reporting, classroom recordings and on-location interviews. Total harmonic distortion is a low 0.1% and the signal-to-noise ratio is −85 dB, supporting transparent vocal reproduction.

Typical scenarios for the BOYA BY-WM4 PRO-K3 include solo vloggers capturing interviews on the street, instructors recording lectures, and event hosts needing a tidy wireless lapel setup. The kit’s combination of compact hardware and camera-ready cabling simplifies setup and teardown.

Key selling points are its condenser lavalier microphone, stable RF performance within the 2405–2478 MHz band, compact receiver and bodypack transmitter, included camera adapter and 3.5 mm audio cable, and straightforward portability.