Features: 1.Frequency voltage display window 2.Bluetooth independent start / off button 3.Line audio input 4.Support use U disk to play music 5.Support MP3/WMA music format 6.Via Bluetooth answer / end / reject / retransmission 7.Bluetooth stereo music player 8.Call echo cancellation and noise reduction (CVC) technology 9.USB output voltage, a voltage of up to 5V / 2.5A to other devices 10.Power frequency automatic memory function 11.Car battery voltage display 12.360 degree rotation function 13.Dual USB Functions: 1.Car Bluetooth FM transmitter: phone, U disk, TF card, MP3 music which is transmitted to the car stereo to play 2.Car Charging: via USB interface to the mobile phone / iPad smart charging. 3.Bluetooth hands-free: a mobile phone via Bluetooth speakerphone key 4.Car USB: U disk can be read via the USB interface or read TF card slot 5.High-fidelity stereo, using DIGITAL, PLL PLL 6.LCD display frequency, choose a more convenient 7.Full frequency transmitter (up to 200 frequencies can be selected) 8.With power-off memory, can store the currently playing frequency 9.Direct button, play/pause, previous/next song Specifications: Type: Bluetooth FM transmitter Model: CAR Q7 Material: ABS Play format: MP3/WMA Bluetooth version: 2.1+EDR Bluetooth sound processing: A2DP (Advanced Audio Distribution Profile) Operating voltage: 12-24V Voltage limit: 9-26V USB Output: 5V / 2.5A Operating temperature: 0-50 C Bluetooth transmission distance: 10m Microphone Effective Distance: 0.5-2m FM Frequency: 87.5-108Mhz FM mode: Stereo digital PLL frequency lock Adapt to the product: fully compatible with Apple, Samsung, millet, Huawei, HTC, Nokia, Google and other mobile tablet count Size: 100x80x20mm Colors: Random Color Weight:90g