Specifications:
Type : Wireless Vertical Left Hand Mouse
Dimension: 4.92*2.56*3.23 inch
Material: ABS
Color : Black
Net Weight: 108g
Resolution: 800/1200/1600 DPI 
Button: Left/Right Button,Forward/Backwards Button,Roller Button,DPI Button 

product features:

• ERGONOMIC DESIGN: Specifically designed for left-handers, fitting the contour 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 length at the computer
• ADJUSTABLE SENSITIVITY: 800 / 1200 / 1600 DPI Resolution Optical Tracking Technology provides more sensitivity than standard optical mice for smooth and precise tracking on a wide range of surfaces
• AUTO-SLEEP FUNCTION: Enters sleeping mode after 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, Mac OS,Linux and more.Fit for Notebook, PC, Laptop, Computer, Macbook and other device