- The BOYA BY-MM1 is a cardioid microphone, which specially design to improve the sound quality of videos on the basis of build-in microphones. With both TRS cable and TRRS output cable included, it can be used on Smartphones, cameras, camcorders, audio recorders, PCs, and other audio/video recording devices. BOYA BY-MM1 comes out in compact size and light-weight aluminum design, it will not be a heavy burden while shooting. Plug and play design, no need to worry the battery status. The included anti-shock mount effectively reduces unwanted vibration, cable and handling noise.