Key Specifications/Special Features: Model No.: E101 2.0 channel multimedia speaker system Output power: 2W x 2 S/N ratioú¦ í¦75dB THDú¦ 20kª+ Response frequencyú¦ 120Hz to 20kHz Subwoofer unit/satellite unit: 3 inches x 2 Input powerú¦ 5V/1A Packing size: 256 x 161 x 221mm Compact, the eternal beauty, and without losing accor stable gas Full bands, such as power, the whole magnetically-shielded satellite unit, the total elimination of multiple unit phase distortion of the guitar as a more accurate, and more details of the real performance Voices of the vast open, highly penetrating power, tenor thick steade, and excessive natural Tommade exclusive use of natural sound processing system and perfect digital audio reproduction . measurement:245*120*203mm/box N.W.:34.8kgs G.W.:36.15kgs Carton Size:505*495*635MM