1.Output: Rms 4w(2w+2w) THD=10%
2.Frequency response: 150-18000HZ (+/-3dB)
3.Signal and Noise ratio of power amplitier:>=60dB
4.Loud speaker: 1.5 inch (extermal diameter 40mm)magnetic resistant 4 ohms
5.Line input: configure 3.5 mm stereo's plugs
6.Power supply input: 4*1.5V AAA, DC-6V,USB
7.Supports all iPod and all audio player with 3.5mmearphones jack (PDA, Mp3, Mp4, PC, PSP, etc.
8.Touch volume control: just a touch increases ordecreases the volume
9.Package including: 3.5mm stereo cable, USB adaptor