The Boya Lavalier Microphone for BY-WM8 Pro is a small, portable microphone that you can use for a variety of purposes. The microphone is equipped with a clip-on clamp, which allows it to be easily attached to clothing, for example. In addition, this lavalier microphone has a lockable 3.5 mm mini jack plug that prevents the cable from being accidentally pulled out of the transmitter when it is moved. The wireless frequencies are 556.71 MHz-575.98 MHz and 576.39 MHz-595.66MHz.