Features: Built-in Bluetooth + microphone, support hands-free calls. Supports advanced audio distribution profile. Off time display function. Digital high-quality FM stereo radio. Preset 6 stations (frequency: 87.5-108 MHz). Support USB / SD / MMC card reading. Support audio format: MP3 / WMA Support AUX-IN function Support folder function. Support breakpoints and ID3 Play. Support remote control.(battery is not included) Rotary volume control. MP3 randomized, 10 track up / down playback. Electronic control volume treble, bass, balance and fader. Multiple EQ Scene Selection: jazz, rock, pop, classical, etc. Mute and Loudness control. L / R RCA audio output jacks.