This BMW M5 sat nav system is a popular product, this sat nav supports steering wheel control, it supports Built-in GPS navigation system,Guidance with the GPS navigation.You can go anywhere, in addition, you can play music in your phone via bluetooth, it is great ,it uses Sirf ARM11 High Speed CPU.Wince6.0 Operation System. Radio function. High sensitive FM/AM tuner 30 stations restorable. Support RDS. more details at http://www.seicane.com/in-dash-car-dvd-gps-navigation-stereo-for-bmw-m5-with-radio-tv-bluetooth-ipod-si-9202-2 .