About this item Dual USB Charging PortThis Bluetooth FM transmitter has two USB charging ports, which support charging 2 devices at the same time and has overcharge protection. A USB port (5V/1A) with a music icon can read U disks, and the other USB charging port (5V/2.4A) can effectively charge your smart device. Bluetooth 5.0Built-in Bluetooth 5.0 chip, you can enjoy faster data transmission speed, and a more stable connection between the device and the audio receiver, the transmission reaches the lossless level, the response speed is faster, low power consumption and almost lossless sound quality, you don't have to look down the phone frequently, driving is more secure. Hands free callsBuilt-in microphone and hands-free function, you can comfortably answer, put on, reject or make calls through the hands-free function, enjoy safe driving and ensure the safety of your family and family. With CVC noise reduction technology, you can easily make smooth and clear hands-free calls. Wide CompatibilityThe FM transmitter support Bluetooth, TF card, U disk for playing music, can automatically detect and play music in MP3/WMA/WAV/APE/FLAC format, not limited to mobile phones, not limited to car models, compatible with Android / IOS mass applications. Ambient Ring Light & LED DisplayThis FM transmitter is designed with blue LED light, which is convenient to use in the dark environment of the car, and also adds a happy atmosphere. It is easy and convenient to see the volume, car voltage and FM displayed on the LED display Frequency makes it easier to use and drive safely at night.