Hatop Cute Dolphin Shape USB Wired Optical Gaming Game Mice For PC Laptop DPI: 1200dpi Size: Approx: 7.7cmX9.7cmX3.7cm Compatible for operating systems Window 7Window Vista, Window XP, Mac iOS Suitable for game enthusiasts, fashionable young, commercial office crowd, long time computer workers Ergonomic design, makes you feel natural and comfortable, long fierce game will not feel tired