Adapter Audio Cable 3.5mm 4-pin audio cross-over

3.5mm 4-pin audio cross-over adapter cable, black * Audio 4-pin cross adapter cable: 3.5mm L-R-MIC-GND socket to 3.5mm stereo L-R-GND-MIC plug * Allows connecting headset to mobile phones with the cross over MIC-GND pinout Cable length: 18 cm 4-pin socket: 3.5mm Audio left ? Audio right ? MIC ? GND 4-pin jack male: 3.5mm Audio left ? Audio right ? GND ? MIC