Feature 1Nice and practical accessory which is fit for Mercedes Benz Smart 450 / Roadster / ForTwo / ForFour. 2By operating with a Bluetoothenabled device, the car radio has no functional limitations. 3Allows you to connect an external audio source, which can be streamed from a smartphone to a car stereo. 4Pair your phone with our Bluetooth module, and then select AUX from the radio, you can enjoy music from your phone through the phone speaker. 5Multi-function, support memory card, USB flash memory, microphone, Bluetooth 5.0, AUX, high-fidelity audio.Item Type: BluetoothMusicAdapterMaterial: ElectronicsCompatible: Support memory card, USB flash memory, microphone, Bluetooth 5.0, AUX, high-fidelity audio.Applicable CD Model:Fit for Mercedes Benz Smart Roadster / ForTwoFit for Mercedes Benz Smart 450 (all models) Grundig radio devices Four with OEM .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Fitment:Fit for Mercedes Benz Smart Roadster 2003-2005 Fit for Mercedes Benz Smart ForTwo 2004-2010 Fit for Mercedes Benz Smart ForFour 2004-2010Wiring Instructions: The red power cord is connected to 12V+The black power cord is connected to 12V-12-pin plug into the CD player jack(Please confirm the corresponding socket)Package List1 x Adapter1 x Microphone1 x Manual