GLiving Bluetooth FM Transmitter Radio Adapter Wireless In-Car Bluetooth Adapter Car Kit Adapter USB Car Charger Hands Free Calling TF Card Mp3 Player Certified by CE, FCC and RoHS. This is a new Bluetooth MP3 Player FM Transmitter Hands-free Car Kit Charger, which support USB driver and can automatically play and transmit the MP3 files of USB driver after matched with your radio by the frequency. Excellent Hi-Fi stereo sound quality. High-performance built-in microphone with Echo cancellation and noise suppression (CVC) technology which can offer your clear talking and wonderful music. Universal USB port lets you charge your Smartphone or MP3 Player. Guarding your driving: Built-in Microphone, you can make hands-free calls easy while driving. Enjoy your safety driving. Switch to Hands-free mode automatically from music playing status when receiving calls. Automatically detect the charging device and charging environment, recognize the optimal current, display output current value, more intelligent than others, exquisite appearance. Compact, lightweight and simple design - perfectly portable and unobtrusive.