Technical Parameters: Rated operating voltage: 12V Consumption rate: -0.5W Working temperature: - 10 to 70 degree Working temperature: - 0-90 Frequency response: -20Hz-15Khz Audio format: -MP3 Bluetooth : Support Bluetooth protocol: HFP/HSP, OPP, A2DP/AVRCP, PBAP Signal to noise ratio: -68dB Bluetooth version: : -v4.2EDR Bluetooth sound processing - A2DP Advance Audio Distribution Profile Bluetooth transmission distance: 5m Working current: 45mA maximum Standby current: 25mA Frequency: 2.402-2.480ghz FM: Fm frequency: 87.5--108.0MHZ Transmitting power: 87dBuv /107dBuv Effective distance: 2 meters Features 1. Bluetooth hands-free calling; USB port with charging function 3.1A 2. Eliminate echo and noise during call; 3. Stereo Bluetooth and FM transmission technology; 4. Support USB/TF card/Bluetooth connection; 5. Support MP3 format music; 6. Automatic power-off memory function; 7. Cigarette lighter takes power: DC12V-24V voltage power supply; 8. Bluetooth version 4.1 FM transmission frequency: 87.5-108Mhz Package List: 1 x FM Transmitter Handsfree Car Kit