Fangrui Product Details , High-quality And Flexible Design. Arc Touch Designed, Optical Technology, Works On Many Different Surfaces And Usage For Home, Office Or Gaming. Usb 2.4 Ghz Wireless Foldable Mouse. Plug And Play, No Driver Required. The Design Saves Battery Life: Curve To Turn On And Flatten To Turn Off. A Red Light Flashes To Show The Battery Is Working. Complete With Receiver And 2 Aaa Batteries. Perfectly Fit For Your Pc And Laptop. Light Weight And Easy To Install. Type: 2.4ghz Wireless,touch Wireless Mouse Interface Type: Usb2.0 Product Specification: Switch Strength: 60+/-15gf Scroll Wheel Strength: 80+/-20gf Button Strength:170+/-30gf Dpi:1200 Switch Life: 50 Million Compatible With /pc/at/xt/386/486/pentium System Supports: Dos,win95/98/2000/me/xp/nt Working Voltage: Dc5+/- Working Current: Less Than Equal 100ma Working Temperature: -45 Celsius -50 Celsius Humidity: Less Than Equal Rh Interface: Usb2.0 Number Of Button: 3 Button Life: 5 Million Times Power: 2x Aaa Battery (not Include) Quantity