... ModeMembrane switchWorking VoltDC+5v (error±0.25)Working Current100MAPortPS/2 OR USBSystem RequirementsWindows98,ME,2000,XP,2003,X64,IBM1> ... Notebook type keycap.2> X-structure design, comfortable hand feeling. 3> Fashionable ... colorsSystem requirementsWindows95,98,2000,ME,XPWorking temperature0-45°CReceiverUSB 2.0 2012 Wired keyboard & mouse combo