1,ES-10 Twins mini speaker is made from wooden crust and metallic A cover. Portable and peculiar 2,Why the unit deliveries a very clear ,nicety and richness sound,it is because that we adopt a twain 1 inch neodymium magnet aluminium alloy,which has strong magnetic sound to make the volume is loud ,the clarity is phenomenal. 3,The 3.5 mm stereo plug connects directly to the speaker of all MP3.,MP4,CD portable Audio player,laptop computer as well as all iPods. 4.It is specially designed for laptops Technical Specification