Bluetooth Car FM Transmitter & Function CollectionDual USB ports, QC 3.0 quick charge, hands-free calling, voice assistant, high fidelity sound quality output, dual screen and voltage display, 7 colors and 2 modes ambient light, support U disk, TF card and Bluetooth music play modes. Easy to UsePlug the Bluetooth FM transmitter into the car cigarette lighter, select an empty FM frequency (87.5-108MHz range) on your car radio, connect the bluetooth from your phone to hands-free car kits, then tune to the same frequency. Once successfully paired, it will transmit music from your phone to the car stereo system. In music play mode, it will automatically switch to phone call mode if there is an incoming call. 18W PD & QC3.0 Effective Charging: The Bluetooth adapter car can fast charge two devices simultaneously via PD18W and QC3.0 ports. which charges your devices very quickly! Capable of charging compatible devices to 80% in just 35 minutes. The 5V/1A USB port with music icon not only for charging, but also for reading U disk to play your favorite music. 7 Colorful LED Strips: The FM transmitter Bluetooth car adapter supports 7-color LED backlight, 7-color LED breathing light makes driving more fun, glows to amplify the atmosphere, and also makes it easier to use and drive at night. Equipped with an LED voltmeter that shows you your car battery status to keep you updated on the vehicle status. Dual Screen and Voltage DisplayCompared to d 'other vehicle FM devices, the latest car Bluetooth adapter for the unique dual-screen display design that provides you with more information, not only displays the FM frequency but also the battery voltage, so that you are always informed of battery consumption, allowing you to be more concentrated while driving. Note: The data is all manual measurement, please allow 1 - 3cm error, due to the difference in light and display, there will be a certain color difference, depending on the physical object received.