Bosjett Bluetooth Wireless Modulator Adapter Car Kit Mp3 Player Music Control and Hands-free Call with USB Car Charger This is a special product that can switch the call to the hands-free state via Bluetooth module. When the call is finished, it will be switched to the music play automatically It can also send the music from mobile phone to your car stereo. You can enjoy the music and answer the call in hands-free mode without refitting your car, which ensure the driving safety while enjoying music. 21W / 4.2A USB Car Charger charges your favorite mobile devices including the iPad (max speed), iPhone (max speed), iPod, HTC, Galaxy, Blackberry, MP3 Players, Digital Cameras, PDAs, Mobile Phones Support USB driver and Micro SD card and can automatically play and transmit the MP3 files of USB driver and Micro SD card after matched with your radio by the frequency This item has high-performance built-in microphone which can offer your clear talking and wonderful music,and it has two USB charging port to charge your portable devices.