note: the item will be !!<br /><br />1.support bluetooth handsfree，built-in microphone，safe and convenient to answer<br />the call，call when the noise processing of cvc，wind noise suppression.<br />2.support a2dp function of mobile phone，mobile phone via bluetooth directly broadcast high-quality mobile phone music<br />3.the power supply after opening，automatic back to even，automatic into the matching condition<br />4.support usb/micro sd card1g-32g，support mp3/wav/wma.flac music format<br />5.can charge for various intelligent mobile phone，usb output 5v500a<br />6.support to connect the computer to download function，can be directly connected the computer to download songs microsd/tfcardmicrosd/tfcard are not included<br />7.with 21 key multi function infrared remote control， can realize the digital song remote dial<br /><br />specifications：<br />1.rated voltage：12-24v<br />2.power consumption：0.5w<br />3.work temperature:-20~50 degree<br />4.frequency response：20hz-15khz<br />5.bluetooth version：v2.1edr<br />6.bluetooth audio process with a2dp function advance audio distribution profile<br />7.bluetooth transmission distance：10-15m<br />8.fm emission frequency：87.5-108mhz<br />9.usb charger output：5v/500ma<br />10.remote control battery: lithium ion batterybattery are included<br />11.transmitter size：7cm*4cm*1cm<br />12.color：black<br /><br />pairing:<br />1. the car mp3 transmitter inserted into car cigarette lighter<br />2. fm transmitter automatically enters pairing states<br />3. open the phone bluetooth， and search"bt carkit" and paired， password"0000" if needed， then you can enjoy your music and handsfree call now<br /><br />package included：<br />1xfm transmitter<br />1xremote controller<br />1x user manual