Connects2 CTSBM014.2 BMW 1/2/3/4 Series F2* F3* Steering Stalk Control AdaptorThis interface has been designed to retain the steering wheel controls and other key features when installing an aftermarket head unit into the vehicle. The interface also allows for the retention of the original head unit for the purpose of retaining the vehicle settings menus Features & Benefits Retains steering wheel control functionality Retains phone button functionality Retains voice commands via SWC (if aftermarket head unit supports) Retains