Car Bluetooth FM Transmitter Dual USB Charger Socket Aux Adapter Hands-free Fast Charging Features: Characteristic: The transmitter is powered by 12 ~ 24 V automobile cigarette lighter hole, Support u disk and memory card play Noise suppression (CVC) Rotary shaft design, easy to use Charging all kinds of smart phones Support mp3 / wma music format Wireless transmission of audio to radio Excellent sound quality and d.s.p. echo cancellation solutions Specifications: Microphone range: 0-2m Audio distortion: 0.1% Left and right channel spacing > 60dB SNR > 60dB Rated working voltage: 12V Power consumption: 1W Bluetooth version: 5.0 Material: plastic Supported formats: MP3, wma Frequency response: 20hz-15khz Transmission frequency: 87.5-108mhz Working temperature: - 20-50 Limit working voltage: 9-26 V Bluetooth transmission distance: 10-15m Packing list: 1 x FM transmitter for hands free car kit