SpeakersOthersWarranty Period6 MonthsN-tek Home Theater? Bluetooth System? with Built-in USB and SD memory card function, Support MP3 music formathome theater system with subwoofer and FM Radio With functionBlack colourVolume, bass, treble, echo, mic-volume separately controlCompatible with PC/VCD/DVD/CD/TV and other audio inputBluetooth function.Speaker- On/Off Power Switch,?USB & SD Input(MP3 Player)Three Small SpeakerHigh QualityMaximum UtilityDurableBluetooth FunctionFM FUNCTION3 SPEAKERSON/OFF SWITCHUSB AND SDBluetooth FunctionSpeaker-K3MOn/Off Power SwitchUSB & SD Input(MP3 Player)Three Small SpeakerFM RADIOHas remote