Features: 1. 180 degree adjustable angle, suitable for all types of vehicles to use. 2. Support Bluetooth 4.0 / 3.0 / 2.0 devices. Supported operating voice prompt support to cable. 3. Support Android and Apple phones and other devices USB charging, the maximum output current of 2.5A. 4. Support Full frequency FM transmitter function, a total of 208 frequencies. 5. Support digital display. 6. Support external TF card in the MP3 / WMA music format player. 7. Support answer, hang up, reject, call-back and other phone features. 8. echo cancellation and noise suppression (CVC) technical support calls. 9. supports automatic power-off memory function. 10. supports Bluetooth stereo music playback. Specifications: Material: ABSColour: BlackSize: 76 * 46 * 91mmWeight: 75gKey / Interface: adjust key, MODE key, the phone keypad; TF card slot, USB2.0 interface, 3.5mm audio interfaceScreen Color: blueRated operating voltage: 12V-24VLimit working voltage: 9V-28VUSB Output: 5V / 2. 5AMemory card playback formats: MP3 WMA WAV FLA Bluetooth version: Bluetooth V2.1 EDR baseband and modemBluetooth transmission distance: 10MBluetooth name: FM01Bluetooth transmission power: class2 and class3Bluetooth receiver sensitivity: -85dBmSNR: