V5.0 Bluetooth Transmitter Note: Recommend to use aux cable to connect transmitter with car. In this way, static noise caused by local big radio station can be avoid. If you need to connect by radio, please choose a empty radio frequency that is far different from local station. Also please turn up the volume of cellphone and turn down the volume of car's. 41W! Charge Faster! 1×Quick Charge3.0 Port(18W) 1×Power Delivery3.0 Type-C Port(18W) 1×USB port (5W) Support charging 3 devices simultaneously. Pair Transmitter with Your Car Stereo: Plug the Bluetooth transmitter into car cigarette socket, set the of car stereo to an empty station, then tune up the of transmitter to the same empty station. Tune Up the of Transmitter: Press “CH” on the transmitter to enter “ ” mode, LED is flashing, turn the multi-function button left/right or press“Next/ Prev”button to adjust And it will auto exit the state if without operation for 3 seconds.