The BT66 Wireless Bluetooth Car Kit MP3 Player FM Transmitter SD LCD Dual USB Charger is a useful, must-have tool for all car owners. It perfectly integrates FM transmitter with MP3 player, hands-free calls and USB charger, offering an easy and safe road trip experience. It can read and play MP3 files from micro SD card or USB flash drive and stream the audio to car stereo system. Inbuilt mic and Bluetooth allow for convenient handsfree calls and it will automatically return to music play after the call ends. It surely is worth buying! Features: Integrate FM transmitter with MP3 player, hands-free calls and USB chargerRead and play MP3 files from micro SD card or USB flash driveStream audio to car stereo system wirelesslyInbuilt mic and Bluetooth allow for convenient handsfree callsExcellent sound quality, with DSP and echo cancellation technologyBuilt with 3.5mm line-in jack, support external audio devicesLED screen displays current frequencyPowered by car cigarette lighter, easy to useOffer two USB ports for cellphone chargingMulti-point technology, pair and maintain connection with two cellphones at the same timeMini and light, easily fit anywhereInclude a remote control for added convenience Specifications: Color: BlueFrequency Range: 87.5-108. 0MhzOutput Frequency: 20Hz-15KHzSupply Voltage: 12-24VRated Current: 90mAPower Consumption: 1WWork Temperature: 0-50 degreesSupport File Format: MP3/WMAUSB Charge Output: 5V/2. 1AMusic Format: MP3 FormatUSB Maximum Support: 32GMicro SD Maximum Support: 32GBluetooth Version: Version 2.1 EDRTransmit Distance: 10mOperating System: Win XP/Win Vista/Win7SNR: R60dBDimensions:9x7.5x3.5cm (LxWxH) Weight: 90gColor:random colorMaterial: Plastic key word:car MP3,vehicle-mounted MP3,bluetooth,USB,AUX,plastic