... Laptop/Notebook,Mobile phone,etc...all kinds of digital player devices. Features: 1) 2.0 speaker for laptop, computer,mp3,mp4,mp5 ... palyer,CD,mobile phone. 2) Carry-home, plug and play 3) High-efficience Class-D professional digital vedio amplifier.3D sound effect ... 4) USB provides power, mini stereo system Specifications:1) Output Power: 3W*2(1KHZ,THD10%)2 ...