... Frequency: 35Hz-20KHz 4.Speaker unit:4"+3"*2 2.1 speaker, computer speaker, multimedia speaker, iphone speaker, USB ... speaker box, speaker system, subwoofer speaker,karaoker speaker.2.1 Multimedia Speaker Specification:Model No.:XC-8806. SubwooferSatelliteOutput power: ... N: ≥45 dB S/N: ≥75 dBDimension:Dimension:150×215×210mm85x165x75mmmmFunctions:USB/SD card reader, Remote Control, FM function. ...