Features: 2 USB charging port to charge most USB Devices. Wireless bluetooth-compatible FM transmitter adapter for car radio,transfer calling/MP3 music/Cellphone voices to car speaker.for most smartphone. Hands free function: built-in microphone, switch to hands-free mode automatically from music playing status when receiving calls. Music playing:support Bluetooth-compatible /USB disk/TF card/ MP3/wma player. With anti-interference performance and CVC-technology.Listening to music while charging. Automatically connect memorized paired when power on. 12-Month worry-free. Support steering wheel to control the player, driving safer. Specifications: Support mobilephone APP control Support dual BT operation Support hands-free calls. Support advanced audio transmission mode. High-quality digital stereo FM radio Support three-band radio store FM1-FM2-FM3, and can preset 18 radio stations. (Radio frequency: 87.5-108MHz) Support USB/TF card reader Support audio: MP3/WMA/WAV formats and so on. Support folder for play function Support remote control. Rotary electronic volume control MP3 for play supports pause /preview/repeat/random for play and 10 tracks up/down selections. Front AUX audio input hole and rear terminal L / R audio RCA output hole. 4 track high-power output (4 high-power loudspeakers) Work Voltage: DC12V Package Includes: 1x Car Bluetooth-compatible MP3 Player note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.