RAYSUN 3 Feet 1M USB & 2RCA to USB & 3.5mm AUX Extension Panel Flush Dash Mount Cable- USB AUX Dash Mount Car Boat Motorcycle (1M USB & 2RCA Dash Mount) 1, A good idea to connect your 3.5mm device into a 2RCA audio output; 2, Designed for car/Boat/Motorcycle with 2RCA input; 3, Works with any audio output with 3.5mm, such as phone, MP3, etc; 4, Use an existing hole or cut a hole in your dashboard and clip in the socket to flush mount it to your vehicle's dash; 5, It features a waterproof panel/dash mount with rubber cover and 1 meter extension cable.