The BY-WM4 Pro-K1 system consists of a body pack transmitter, a camera-mount receiver, and and omnidirectional lavalier microphone. Also included with this system is a shoe-mount adapter, a single 1/8" to XLR output cable, a single 1/8 to 1/8" output cable, carrying case.

BOYA BY-WM4 Pro-K1 consists of one compact body-pack transmitter (TX4 Pro), a portable receiver(RX4 Pro), a Lavalier/lapel microphone, an omnidirectional lavalier microphone, a 3.5mm TRRS audio cable and a 3.5mm TRS audio cable, which provides immediate out-of-the-box operability for anyone, making it ideal for video, podcast, and mobile journalism applications. The receiver is built with 3.5mm mic and 3.5mm headphone output jacks. The bodypack transmitter includes a MIC jack and LINE IN jack. For mobile Journalists, Vloggers, YouTubers, Padcasters and more. Compatible with most of Audio/Video equipments, such as Smartphone, tablet, DSLR, small recorder, Audio Recorder, PC etc. Dual-channel receiver allows working two transmitters at the same time. Compact and lightweight bodypack transmitter and receiver Electret condenser, omnidirectional lavalier microphone With simple gain buttons and a power/pair button, the system is comfortably easy to use.