describe: -100% Brand New High Quality! -Dual USB charging ports for charging iPod/iPhone, Samsung, iPad, Nokia and other mobile devices (output 5V/3.1A) -Vehicle battery voltage detection -Multi-mode more→charging - 2 USB ports can charge mobile phones and car electronics at the same time. - SPECIAL DESIGN - Specially designed to fit the cup holder of your car or truck, it can make your car neater. feature: 1. Bluetooth answer, hang up, reject, redial and other functions 2. Support Bluetooth stereo music playback 3. Blue digital tube display 4. Support car battery voltage detection 5. Support U disk playback (maximum 32G) 6. Support MP3/WAV format music 7. Support FM full frequency point