This Bluetooth Car Adapter use zinc alloy-unibody-construction ,making it beautiful,sturdy and durable, also with excellent thermal performance. It can quickly export the heat generated during the charging process , thereby prolong the natural life of the machine. It won’t be melted or fired, so more safer than a plastic one! | Bluetooth Car Adapter by AUX is more stable than FM mode, but if there is a static when using AUX or if your car does not have an AUX port, you can also use FM mode ;We have used enhanced signal technology, so even by FM mode ,it can provide you with very nice performance. | You can easily switch songs while driving,toggling to the left is go back to the previous song, right is to the next song.Pressing down is Play/Pause (This can also answer hands-free calls during incoming calls)，It is a comfortable device for Bluetooth Car Adapter ! | Built-in latest Bluetooth 5.3 technology, providing you with faster connection and clearer sound ！Our Bluetooth Car Adapter support transmiting any voice from your phone to the car,such as music/navigation/calling .We also set up the automatic reconnection function after the first connection,as soon as the car starts, the machine will automatically connect to your phone next time. | The Bluetooth Car Adapter has two USB ports, the blue one is QC3.0 fast charging port, which can provide a charging power of 25W, 4X faster than standard chargers; The other one is the 5V2.4A charging port, which also supports reading USB disk for playing musics.