FM Transmitter is a new Bluetooth FM Transmitter with Hands-free Car Kit Charger, which supports USB driver and TF card, AUX play. It can automatically play and transmit the MP3 files of USB driver and TF card. Built-in microphone with Echo cancellation and noise suppression (CVC) technology can offer your clear talking and wonderful music. Two USB charging ports are provided for you to get your devices full charged in short time. Features: Bluetooth Function: With advanced Bluetooth module, it supports stream music from your phone or tablet via Bluetooth. Hands-free call: With built-in Mic, you can make hands-free calls easily and safely. 2 USB Charging Ports: With two USB charging ports, you can charge your phone or other devices simultaneously.No need to worry about power shortage. Specifications: - Bluetooth version: V4.0 + EDR - Bluetooth sound processiong: A2DP - Display Screen: 1.3 inch LED screen - AUX: Output/input - USB Charging: 5V/2.1A+1A - FM frequencies: 87.5MHz~108.0 MHz - Effective range: 2m Operation Guide: - Plug the FM transmitter into your car cigarette lighter socket for power and please find search this device - Find an empty station and keep the FM transmitter and car FM radio at the same frequency. Note: ▲ Please change another stable channel if it has a lot of static because of frequency conflict. ▲ Please adjust the channel when the screen displays the channel interface. Package Included: 1 x FM transmitter 1 x User manual 18 Month Worry-Free Warranty. 24 Hour dedicated email customer support. 100% Customer satisfaction.