perfect set. goodlooking and great function. Keyboard features: Dimension450x157x18mmKeycaps107 keycapsNet Weight600gWorking ModeMembrane switchWorking VoltDC+5v (error±0. ... /2 OR USBSystem RequirementsWindows98,ME,2000,XP,2003,X64,IBM1>Notebook type keycap.2> X-structure design, comfortable hand feeling. 3 ... ,98,2000,ME,XPWorking temperature0-45°CReceiverUSB 2.0 Wired keyboard & mouse combo