*Features*: *Ergonomic Vertical Design*:Scientifically designed with ergonomic vertical mouse,offers you healthy wrist and arm positions,effectively release your hand fatigue and arm strain while working for a long time. Perfect for those officemen needing long time working with mouse. *3 Adjustable DPI*:With a DPI adjustment button on the mouse top,easily switch to 800,1200 and 1600 DPI,provides higher sensitivity than standard optical mice with smooth and precise tracking on different kinds of surfaces,meeting your different work or game needs. *Multifunctional Buttons*:With DPI switch for easily adjusting the sensitivity of the mouse. Added forward/backward buttons for convenient webpage browsing,increasing your work efficiency. A sturdy scroll wheel ensures your hand will not slip when scrolling. *Plug & Play*:Simply plug the USB receiver into your device. With 2.4GHz digital wireless transmission up to 32.8ft,no lag,no loss of connectivity,no need to code. Plug and play *Wide Compatibility*:With 2.4GHz wireless technology,widely fit for windows 2000/ XP/ Vista/ 7/ 8/ 10 & MAC. Compatible with desktop,laptop,PC,and other devices. *Specifications*: Product Type: Wireless Vertical Mouse Color: Black Material: ABS Key Quantity: 6Pcs Wireless Connection: 2.4GHz Wireless Connecting Distance: 10m/32.8ft Powered By: 2Pcs AAA Batteries(NOT Included) DPI: 800-1200-1600DPI Keystroke Time: 5000,000 Backlit: Colorful Backlight Compatible System: Windows 2000/XP/Vista/7/8/10&MAC Item Size: 12.5x6.5x7.5cm/4.92x2.56x2.95in Item Weight: 102g/0.22lbs Package Size: 12*9*8cm/4.72*3.54*3.15in Package Weight: 125g/0.28lbs *Package Lists*: 1 x Wireless Vertical Mouse 1 x USB Receiver