[Bluetooth Car FM Transmitter and Function Collection] Dual USB ports, QC 3.0 fast charging, hands-free calling, voice assistant, high-fidelity sound quality output, dual screen and voltage display, 7 colors and 2 ambient light modes , support U disk, TF card and Bluetooth music playing modes. We offer a one year warranty. If you have any questions, please contact our customer service. [Easy to use] Plug the Bluetooth FM transmitter into the car cigarette lighter, select an empty FM frequency (range 87.5-108 MHz ) on your car radio, connect your phone's bluetooth to the 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 playing mode, it will automatically switch to phone call mode if there is an incoming call. [18W PD Efficient Charging & [QC3.0]: The car Bluetooth adapter can quickly 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 Supports 7-color LED backlight, 7-color LED breathing light makes driving more fun, shines to amplify the atmosphere, and also makes it easier to use and drive at night. Equipped with an LED voltmeter that shows you the status of your car battery to keep you informed of the vehicle's status. [Dual Screen and Voltage Display] Compared to other FM devices vehicle, the latest car Bluetooth adapter for the unique dual screen display design that provides you more information, not only shows the FM frequency but also the battery voltage, so you are always informed of the battery consumption, allowing you to be more focused while driving.