Hands Free Call: Built-in microphone and handsfree calls function, all in one button for answer/ reject/ hang up/ recall, allowing you to seamlessly switch between incoming calls and music. With anti-interference performance and CVC noise suppression technology, which can effectively eliminates road noise, wind noise and other interferences, ensuring that you enjoy clear call and music streams. You can also get clear voice navigation from your phone's app, which means driving will be safer Upgraded Bluetooth 5.3 & Enhanced HiFi Deep Bass: The FM transmitter uses Bluetooth 5.3 technology, which optimizes the transmission delay and connection defects of old Bluetooth. It can provide a more stable and faster connections, bring you clear call and lossless sound quality music. Experience powerful deep bass and immersive stereo streaming music with the "EQ" button. After successfully pairing with the device for the first time, there is no need to repeat the pairing 7 Colors