This adaptor is designed to adapt a mini stereo phone jack. It is for use as a headphone adapter. It can be applied to earphones, headphones, electric pianos, guitars and other instruments, mixers, specialist audios, speakers, microphones, phones, mp3 players, etc. Features: Pure copper connector and Zinc alloy shell. Connection: Soldered. Size: approx 40*26*9mm/1.57*1.02*0.35''. Quantity: 1pc.