Provenice 7 inch Car GPS Navigation Bluetooth AV-IN Rear View Camera 4GB Free Maps US ship GPS Module--- High Sensitive GPS Receiver Memory Size--- 128MBytes Displaying Screen--- 7 inch TFT high resolution 800*480 Audio------ A: Built-in 1W/ 8 ohm B: Stereo track: 0.25W/CHANEL, single track 8 ohm/1W FM FM transmitter (76.0MHz -108MHz) Transfer the GPS sound to Car,not FM Radio Charging socket ---12V DC socket