Features: The keyboard is lightweight, ultra-thin and compact. It fits easily in your briefcase, backpack or notebook carrying case. With its high quality silicone material, the keyboard is waterproof and dustproof. It can be used in any harsh environment and can be cleaned and disinfected. This keyboard has good elasticity, quietness, it feels soft and comfortable for us to touch. It is a 108-key foldable and anti-fall keyboard. Plug and play. No need for additional drive. With USB interface, it is compatible for Windows 98/ XP/ 2000/ ME/VISTA. Specifications: Item Weight: 212g / 7.48oz Package Weight: 242g / 8.54oz Line length: 129cm / 4.23 ft Item Size: 50cm * 13.2cm / 19.67 * 5.20 in (L * W ) Package Size: 7.9cm *14.6cm * 7.9cm / 3.11 * 5.75 * 3.11in (L * W * H)