Built-in Bluetooth + microphone.Hands-free callsSupports Advanced Audio Distribution ProfileOff time display functionDigital high-quality FM stereo radio，Preset 18 stations (frequency: 87.5-108 MHz)Support USB / SD / MMC card readerSupport Audio: MP3 / WMA / APE / FLAC / WAV， etc.Support folder functionSupport breakpoints and ID3 PlaySupport Remote controlRotary Volume ControlMP3 randomized， 10 track up / down playbackElectronic control volume treble， bass， and faderMultiple EQ Scene Selection: jazz， rock， pop， classical， etc.Mute and Loudess controlL / R RCA audio output jacks4-channel high power output (4 loud speaker)Car MP3 size: 178 mm (W) * 50MM (H) * 125 mm (D)Overall dimensions: 188 mm * 58mm (H)SpecificationsRadio Tuner，Bluetooth，Charger，MP3 PlayersPlacement: In-DashRadio Response Bandwidth: 87.5-108MHzModel Name: JSD-520Resolution: 256*186Out Power: 60W*4Material Type: Aluminum+plasticOSD Language: EnglishColor: BlackDisplay Size: 2.5"Voltage: 12VPacket included1 x Car MP3 1 x Car Speaker cable set1 x installation fix metal1 x English User Manual(Note: Product unworthy SD card and U disk and other memory card)