With the 3.5mm to RCA cable it is possible to connect your MP3 player, mobile or laptop to your Hi-Fi, TV (if it has RCA) or your amplifier. Connect it via the small 3.5mm jack to your mobile phone and then connect the two male RCA plugs to the red and white sockets of your Hi-Fi or amplifier to enjoy quality stereo sound thanks to the gold-plated terminals.