ProHT Foldable USB Wired Keyboard (70140), 109 Keys Silicone Soft Waterproof Keyboard for PC Notebook Laptop, Black Rugged silicone material - Durable and dustproof design; Withstands abuse. Waterproof & Dustproof - Can be washed with soap and water; food crumbs or dust can be easily cleaned thoroughly. Portable and easy to store  This foldable and lightweight keyboard can be roll up and take anywhere. Silent Click - Soft material allows discreet silent typing experience. No typing sound design makes you have a quiet working environment and avoid disturbing others. At night, it can keep your family have a good sleep and also keep you do work seriously. Wired USB connection - Support main USB port, Plug and Use; Compatible with Laptop, Notebook, Computer. Compatible systems: Windows 98se, ME, 2000, XP, and Vista; Works with MAC OS 8.6 and newer.