Inputs: One 3.5mm (1/8') stereo and two 3.5mm (1/8') mono inputs Output: One 3.5mm (1/8') TRS stereo output for DSLR Cameras, Camcorders, Recorders, etc Dual control knobs; Mono/Stereo switch Universal camera/camcorder attachment via standard hot-shoe. Also features three integrated mounting shoes for microphones, recorders, lights, etc. Passive circuit requires no batteires