The Boya BY-MP4 is simple and functional 2-channel audio adapter. The BY-MP4 can be connected to a Smartphone, DSLR, Camcorders and PC using the supplied 3.5 mm TRRS cable and the 3.5 mm TRS cable. The BY-MP4 offers you an easy solution for using audio mixing and dual mic mounting. The BY-MP4 has three mounting shoes on which you can mount various accessories, such as microphones, wireless receivers, LED lighting, etc.