link:http://www.seicane.com/bmw-3-series-f30-gps-navigation-with-radio-bluetooth-ipod-srd-8840-1 .This is the BMW F30 aftermarket sat nav system,this video will tell you how to use the BMW F30 aftermarket sat nav system,this sat nav system uses 8 inch 800*480 digital high definition TFT LCD touch screen. it supports rear view camera automatically switching to rear camera when revese the car, We adopt the latest 800MHZ ARM11 processor to develop high performance multimedia car dvd with the functions of GPS navigation. audio&video. entertainment and etc.Guidance with the GPS navigation, you can go anywhere!come on!