... sound on different surface 2.Portable , cute and fashion 3.Novel design Drawf resonance Speaker:Get different sound effect on ... easy to carry, simple operation, saving energy and securityUsing high-tech such as resonance theory Output :3W(rms)3.5 mm stereo plug compatible ... mobile phone, computer, etc. Mini Dwarf Vibration Speaker with 3.5 mm stereo plug compatible with all MP3, MP4, CD, DVD, mobile ...