This is a microphone cable, and does exactly what it says on the tin. I bought it as part of turning my computer into a little home studio, and needed it to plug the mic into the sound-card/mixer equipment I bought. The connection at either end is XLR (ie it extends the connection on the microphone). This means whatever you're plugging it into needs an XLR (circular with three pins) socket. The cable is 20 ft in length, and fairly heavy duty.