Ergonomic Vertical 2.4G Wireless Optical 6D 1600DPI Gaming Mouse Features: ERGONOMIC DESIGN: Specifically designed for left-handers, fitting the of your palm for maximum comfort THUMB BUTTON: Forward/backward buttons for ease webpage browsing, the superior choice for internet surfers, gamers and people who work at the computer SENSITIVITY: 800 / 1200 / 1600 DPI Resolution Optical Tracking Technology provides more sensitivity than standard optical mice for smooth and tracking on a wide range of surfaces AUTO-SLEEP FUNCTION: Enters sleeping mode 8 minutes idle, press right or left button for it to wake,save battery power WIDE COMPATIBILITY: Support Windows 2000/ ME/ XP/ 7/ 8/ 10/ Vista/98, , and more.Fit for Notebook, PC, Laptop, Computer, and other device Specifications: Type : Wireless Vertical Mouse Dimension: 4.92x2.56x3.23 inch Resolution: 800/1200/1600 DPI Wireless distance: 10m Key number: 6 Power:2xAAA Battery (Not included) Material: ABS Color : Black Package includes: 1 xLeft hand Wireless Optical Vertical Mouse 1 xUSB Receiver