1、Applicable Models: The bluetooth AUX IN adapter cable is especially designed replacement for Smart ForTwo 451 2007‑ with ISO 6PIN Port, exact fitness and stable performance. 2、Easy to Use: Just pair your phone or pad with bluetooth module, then select AUX in your car radio, and you can listen to music from your device with bluetooth function through car speakers. 3、Convenient Installation: The bluetooth audio AUX in cable is professionally designed to perfect fit your models, just plug the 6pin connector into the socket on the back of your car radio without modification. 4、Stable Connection: The wireless AUX in adapter cable adopts bluetooth 5.0 protocol with stable performance and high efficiency, deliver a a sound enjoyment and a funny driving to you. 5、High Quality Production: The bluetooth audio adapter wire has undergone extensive quality testing to ensure long service life as well as strong durability and reliability.