iMicro Keyboard and Mouse Combo (KB-IMKB+MO) Keyboard: Material: ABS+PC; keyboard working voltage: 5VDC5%; keyboard working current: 50MA (max.); Relatively humidity: Operating8%~90% RH; Storage8%~90% Operation System: Windows95/98/2000/ME/NT/XP/Vista/Windows7, DOS,; Wire rod Interface: 2.4G; LED indicator: Yes; Key number: 103 Keys (by language) Mouse: Features: High-precision optical sensor design, mouse ball is not required; Programmable button make it easier for surfing the web or reading documents; 3D scrolling in all Windows98/ 2000/ ME/ XP Type: Optical 2.4G RF; Material: ABS; Scroll Wheel: Yes; Interface: USB 2.0