Technical Parameters: 
Rated Power: 2.5W*2 
Frequency: 90Hz— — 20kHz 
Impedance: 4 OHM(Ω ) 3W 
Degree of Distortion: 03%1W 1kHz 
Channel Separation: ≥ 45dB 
Output Power: 3W*2(RMS) 
Signal&Noise Ratio: ≥ 60dB 
Power Supply: Comes with USB line 
Color: Blue/Red/White 
Color Box Weight: 930.5g 

Features and Function: 

2.1 Subwoofer 
(1) Comprehensive anti magnetic and reduce noise: Unique case and circuit design processing can avoid the casing damping and the interference of high frequency equipment, make audio effect more lifelike and perfect. 
(2) Efficient digital amplifiers: The alto is clear and bright, high Channel Separation, rich in detail. 
(3) Line control to adjust the volume: Humanized design of line controller, easy to adjust the volume, easy to operate. 
(4) Support system: Can connect laptops, mobile phones, iPad, MP3, MP4, CD, PDA, etc., it's the best fashion of partner for notebook, digital AV products and diamondTV.