perfect set , goodlooking and great function Keyboard features: Dimension448x165x23mmKeycaps107 keycapsNet Weight526gWorking ModeMembrane switchWorking VoltDC+5v (error±0. ... feeling. 2> Intimate waterproof design to prevent short circuit of keyboard from water flowing. 3> Laser keycap,the words are hardly ... ,2000,ME,XP,2003,X64Working temperature0-45°CReceiverUSB 2.0 Keyboard and Mouse Combo