Multifunction Bluetooth Vehicle MP3 Player Product specification: Built-in Bluetooth + Microphone Support hands-free calls. Support advanced audio transmission mode. Support the clock indicating while power is off. 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 play function Support remote control. Rotary electronic volume control MP3 play supports pause /preview/repeat/random play and 10 tracks up/down selections. Electronic type bass/treble/left and right balance/front and back balance volume control 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 or 24V Kindly attention: This car radio does not BUILT IN or include any Memory card or TF card inside. There is not CD room for the CD Player. This does not Support CD/DVD Player. This car radio MP3 player supports the USB TF card. Due to customs issues, the remote control does not come with batteries and needs to be purchased by the buyer. The battery model used by the steering wheel remote control is CR2025. Package Include: * 1 x MP3 Player * 1 x Power & car speaker cable set * 2 x Installation fix metal * 1 x Manual * 1 x Steering wheel controller (Optional)