Technical Parameters:Rated operating voltage: 12VConsumption rate: -0.5WWorking temperature: - 10 to 70 degreeWorking temperature: - 0-90Frequency response: -20Hz-15KhzAudio format: -MP3Bluetooth :Support Bluetooth protocol: HFP/HSP, OPP, A2DP/AVRCP, PBAPSignal to noise ratio: -68dBBluetooth version: : -v4.2EDRBluetooth sound processing - A2DP Advance Audio Distribution ProfileBluetooth transmission distance: 5mWorking current: 45mA maximumStandby current: 25mAFrequency: 2.402-2.480ghzFM:Fm frequency: 87.5--108.0MHZTransmitting power: 87dBuv /107dBuvEffective distance: 2 metersFeatures1. Bluetooth hands-free calling; USB port with charging function 3.1A2. 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