Built-in Bluetooth + Microphone 2USB, USB charging Supports hands-free calling. Supports advanced audio transmission mode. Supports clock indication when power is off. Model: 2225 Storage Capacity: No memory FM Function: Yes (87.5-108 MHz) PC Interface Type: Bluetooth : Built-in Car MP3 Player High Quality Digital Stereo FM Radio Supports FM1-FM2-FM3 tri-band radio store with 18 preset stations. (RF: 87.5-108 MHz) Support USB / TF card reader Support audio formats: MP3 / WMA / WAV, etc. Support folder playback function Support remote control. Rotary electronic volume control MP3 playback supports pause/preview/repeat/shuffle and 10 track up/down selection Electronic bass / treble / left/right balance / balance / rear volume control AUX audio input hole and L/R audio output hole on the back. 4-track high-power output (4 high-power speakers) Color display Input voltage: DC 12V Output power: 4*60W Frequency range: 87.5MHZ-108.0MHZ Maximum current consumption: 15A Compatibility: for car