【Bluetooth FM Transmission】 Bluetooth V5.0 provides FM transmitter faster pairing and more stable sound than other common transmitter on the market, which can avoid unstable connection problems effectively. stable Bluetooth and FM connection to transfer music directly from your phone to your car's sound system, can give you the ultimate listening experience. | 【U-disk or TF Card Connection】Plug the U disk with MP3 files into the USB port to enjoy music. You can also support TF card If you do not use the U disk. A variety of playback options to keep your driving full of fun. Upgraded chip makes music playback smoother and easier to use. | 【Dual Charging USB Ports】Coming with 2 USB ports, you can charge two devices simultaneously. Built-in over-current protection, over-voltage protection, intelligent temperature control, short circuit protection, it will effectively ensure safe charging. | 【Hands-free Answer Calls】Bluetooth FM transmitter supports voice commands to ensure safe driving. High-performance microphones with noise-cancelling technology provide clear calls and complete voice control while you drive. Answer / redial / cancel or end a call with the click of a button to ensure your safe driving. | 【Wider Range & Compatibility】This Bluetooth transmitter is well compatible with most of the smartphones and more devices that equipped with bluetooth function. It will automatically connect to its memorized paired Bluetooth device when power on.