Clip-On Lapel mic for Android smartphones ,Samsung, Apple iPhone,laptop, DSLR Canon Canon EOS DSLR 5D Mark II III 6D 7D 7D II 77D 80D 70D 60D T6s T7i T6i T5i T4i T3i SL1 ,Nikon，Sony Mirror-less camera A7,A7S,A9, camcorders, ZOOM audio recorders, PC etc. NOISE CANCELLING FOR FLAWLESS RECORDINGS.“OFF" mode is for smartphone , "ON" mode is for DSLR cameras.