Features: 1.Fitment: Replacement for Smart Fortwo 450 (all models) with AUX IN preparation, suitable for Grundig radios. 2.Audio Format: Supports MP3 audio format and high quality audio formats such as for WMA and for WAV. A great experience to enjoy mobile music while driving. 3.Function of AUX IN Cable: Pair your phone or tablet with the Bluetooth adapter, select Aux from the radio, and you can use your phone to play music through the car speakers. 4.8Pin Connector: The car Bluetooth module has an 8Pin connector and is easy to operate. You just plug the 8Pin connector into the socket on the back of the radio. 5.Premium Material: Using upgraded premium ABS plastic housing, this cable is heat resistant and high temperature resistant, not easy to break.Specification:Item Type: Car Bluetooth ModuleMaterial: ABSBluetooth: 5.0Fitment:Replacement for Smart Fortwo 450 (all models) with AUX IN preparationfor Grundig radiosNOT Replacement for Smart (451) radios