Bluetooth Specification: V2.0Supports advanced audio distribution profile. Off time display functionDigital high-quality FM stereo radio. Preset 18 stations ( frequency: 87.5-108 MHz )Support USB / SD / MMC card reader; Support Audio: MP3 / WMA / APE / FLAC / WAV etc. Support folder function; Support breakpoints and ID3 Play; Support remote controlRotary 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 loud control. L / R RCA audio output jacks. 4-channel high power output ( 4 loud speaker )Support modes: BT / APE / WAV / WMA / MP3 / FMThe remote control battery (not included ): CR2025 3VFM RadioTuning Range: 87.5 - 108.0MHzSensitivity: Less than 20dbStereo Separation: More than 25dbSNR: More than 60dbSome PlaybackMusic format support: MP3 / WMADisplay format: ID3 displayDistortion: Less than 0.3 percentsPower Supply12V Machine: 11 - 16VOperating temperature: -20 - 60 deg.CQuiescent current speaker impedance: 4 ohmFrequency Response: 20 - 20000HzFuseRed: 1AYellow: 15AType: Car MP3 PlayerSpecial Function : FM Radio, Bluetooth, Hands-free calls, MP3 Player, USB flash diskOutput Power : 4 x 60WVoltage : 12VMusic Source: SD card, 3.5mm stereo headphone jack, Cellphone, Flash driveBuilt-in EQ: Rock, Classic, Pops, JazzSNR (dB): greater than equal 60dbDegree of Distortion (%): Less than equal 0.3%