MAIN FEATURES: Mechanical specification(MULTIMEDIA KEYBOARD) Specially designed for windows(No driver program needed) Key life:≥10,000,000 times Compatible with windows95/98/NT/2000/XP Key bounce :1500mm 20 Hot keys(Including three ACPI keys) for easy access of internet Volfage :5±0.25v and Multimedia Operating remperature :-10C~+50C IBM PC /AT ,PS/2 Port available Storage temperature:-20C~+60C Multipe language versions available Relatively Humidity:10%RH~95%RH good quality with best price