Two-Channel audio adapter ideal for shooting videos with any DSLR or camcorder that has a standard mounting shoe. This adapter provides you with a compact dual-mic mounting and audio mixing solution, which allows you to easily mount and control two microphones or wireless receivers. It requires no batteries or power source. Features: two mono 1/8""(3.5mm) Inputs one stereo 1/8""(3.5mm) Input one 1/8""(3.5mm) Stereo output stereo/mono output switch dual trim control knobs three integrated mounting shoes passive operation requires no batteries. for use with DSLR cameras, camcorders, and microphones with 3.5mm Output.