BT-C1 Car MP3 Hands Free FM Transmitter 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: ABS Colour: Black Size: 76 * 46 * 91mm Weight: 75g Key / Interface: adjust key, MODE key, the phone keypad; TF card slot, USB2.0 interface, 3.5mm audio interface Screen Color: blue Rated operating voltage: 12V-24V Limit working voltage: 9V-28V USB Output: 5V / 2.5A Memory card playback formats: MP3 WMA WAV FLA Bluetooth version: Bluetooth V2.1 + EDR baseband and modem Bluetooth transmission distance: 10M Bluetooth name: FM01 Bluetooth transmission power: class2 and class3 Bluetooth receiver sensitivity: -85dBm SNR:> 93dB Microphone Effective Distance: 0.5-2M Operating temperature: 0 to 50 degrees Distortion: <0.1% Frequency response: 20Hz-15Khz FM transmit frequency: 87.5 ~ 108Mhz Transmit FM mode: Stereo digital PLL frequency lock key word:car MP3,vehicle-mounted MP3,FM transmitter,hands free,ABS