Features:1. Wireless transmit the music and phone call to your car stereo system.2. Full optional FM frequencies: 87.5-108.0 MHz.3. Elegant LED screen to display numbers.4. Support MP3, WMA format.6. Equip Bluetooth V4.2 technology, with hands-free talking function.7. Built-in microphone with echo cancellation; noise suppression( CVC) technology.8. Support A2DP with excellent Hi-Fi stereo sounds.9. Dual USB port with 5V 3.1 A charging output.10. Power off memory function.11. Detect and display the voltage.12. Supports AUX audio output.Specification:Model Number: HK202Product Weight: 60gBluetooth Version: V4.2+EDREffective Range: 10m(Free space)Frequency Response: 20Hz-20kHzCharging Output: 5V 2.1A / 1AInput: DC12-24VFrequency: 2.402GHz-2.4GHzSensitivity: -92dBmRF Output: 4dBmFM: 87.5MHz-108.0MHzTF Card/ U Disk: SupportPackage Included:1 * Bluetooth Hands-free FM Transmitter1 * User Manual