More Safer & Fast: The Bluetooth FM transmitter for car provides multiple protections while you are driving with your devices charging, such as over-current, over-heat, over-voltage and short-circuit. The Bluetooth car adapter 95% more efficient than normal, so you can boost your devices from 0% to 85% in just 30 minutes.Clear & Stable Hands-Free Calling: Hands-free design makes your driving easier and safer. The bluetooth fm transmitter for car built-in high-performance noise suppression microphone for a clearer and smoother call, switch to hands-free mode automatically from music playing status when receiving calls. Answer/Reject/Hand up/Recall all in One key.Widely Compatible: Our Bluetooth 5.3 FM transmitter adapter for car radio, transfer calling/MP3 Music/Cellphone voices to the car speaker. Compatible with most smartphones and Bluetooth-enabled devices. Such as iPhone/iPad Pro/Samsung/Google/MP3 player/Android phone. Fit 12-24V car cigarette lighter (car, suv, truck, etc.)Music Adapter & Player: Connect car radio and this Bluetooth adapter via the FM channel. Then you can enjoy music from Bluetooth devices/USB flash drive to the car stereo. With anti-interference performance and CVC technology. Listening to music while charging. Automatically connect memorized paired when powered on.7-Color LED Light: Rainbow light design of the outer circle creates new atmosphere to the car's interior space, making driving more fun.