Comfortable Keycap design, not easy to feel tired Colorful back light, so stylish and one key to turn on/off Waterproof keycap design, more safety Narrow edge design, saving place Mouse Kit Material: ABS Support Operating System for Windows xp/ for Vista/ for Win7/8/10 for Mac OS X Resolution800/1200/1600DPI Mouse Size: 12.5 cm x 7.3 cm x 4cm/ 4.92" x 2.87" x 1.57" Keyboard Size: 44.2 cm x 13.3 cm x 3cm/ 17.40" x 5.24" x 1.18"