Trippel-ISO cable for Opel original stereo 26 pos ISO (not Car 100, 200, 300), Sony Ericsson (4-pin) HF.
Is to be used with an original stereo in order to get a mute function. Connection via the vehicle's speakers and adjustment of the handsfree sound via the stereo volume control. With power supply to the handsfree box. Not mic connection. Is to be used when the vehicle is not phone prepared. The code for the car stereo is required if the power supply is interrupted.