Made with special materials Ultra-thin keyboard. Black,chocalate color ps2 or USB,waterproof keyboard Dimension458x195x20mmKeycaps104 keycapsNet Weight592gWorking ModeMembrane switchWorking VoltDC+ -0.25vWorking Current100MAPortPS/2 OR USBSystem RequirementsWindows98,ME,2000,XP,2003,X64,IBM1> Laser key cap,the words are hardly to be worn.2> More than 10 million keysrokes percussion life. 3> Using ...