Features: 100% brand new and high quality. Small appearance size, practical in most of the cars. Support bluetooth 4.0/3.0/2.0, Support voice & calling promp Support charger for Android & Iphone or other device, max. Output 2.5 Full frequency FM transmitter, total support 208 frequency. Support TF card/U disk MP3/WMA music play. Bluetooth answer, hang up, reject, redial calls and other functions. Echo cancellation and noise suppression (CVC) technology during a call. Automatic power-off memory function. Bluetooth stereo A2DP music play. Specifications: Rated operating voltage: 12V---24V Working voltage limits: 9V-----28V USB Output: 5V/2.5A Memory card format : MP3 WMA WAV FLA Bluetooth Version: Bluetooth V2.1+EDR baseband and modem Bluetooth transmission distance: 10M FM transmission frequency: class2 and class3 Bluetooth receiver sensitivity: -85dBm sensitivity SNR: SNR > 93dB The Microphone valid distance: 0.5---2M Working temperature: 0~50 degree Distortion: