Top-Navi Car DVD GPS Navigation For Mercedes Benz Old C Class W203 2000-2004 A8 Chipset 3G Wifi Bluetooth Radio RDS Free Map V-20 disc changer memory(20 disc music can be memory in the unit while you listening the music) 2. Picture ON Picture fucntion Picture ON Picture fucntion.All keys with red green colors adjustable, match your original car perfectly. Three Zone function, listening to Radio/watching GPS image in the front and watching DVD/USB/SD/TV from the back Monitor synchronously Built in 4G Flash Sumsang CPU 1G MHZ, DDR: 512MB Support Bluetooth, phone book ,3G modem , camera and parking sensor