RHM Desktop Computer Speakers 2.0 channel bookshelf speakers With USB, BT, AUX 

• Output Power: 20W + 20W
• Frequency Response:  20Hz~150Hz  150Hz~20KHz
• Speaker Unit: (3.5″+1″) x 2
• Power Supply: Adapter 15V / 3A
• P.M.P.O.: 1000 W
• S/N Ratio: ≥78dB
• Distortion: 0.1% 1W 1KHz
• Speaker Size: W 135 x H 220 x D 160 mm
• AUX / USB / BT 5.0
• Silk-dome Tweeter