2.1 Speaker with USB reader/ remote. Features. 3" full range driver for satellites. 6.5" bass driver for subwoofer. Heavy duty metal grill for subwoofer & powerful aero port. Gloss finishing for satellite front panel. Plug & play USB card reader. Card reader supporting MP3/WMA dual format decoding. Four buttons for USB reader control including source, play/pause, next, previous. Bass control on back panel. Wooden cabinet delivers low distortion, yet powerful bass. Fluorescence full function remote control. Play your desired song directly by using the keypad on the remote. Specification: Power output: 18+14Wx2(RMS). Satellite: 3". Subwoofer: 6.5". Subwoofer. Frequency response: 20Hz~ 120Hz. Satellite Frequency response: 130Hz~120kHz. Signal to noise ratio: ≥ 75dB. Separation: ≥ 40dB. Dimension: W99 x H98 x D208 mm (satellite); W223 x H285 x D286 mm (subwoofer). Weight: 4.4 kg