ESYNiC 2.4G Wireless Mouse Vertical Ergonomic Optical Mouse Scroll Wireless USB Mouse with Adjustable Sensitivity 1600 1200 800DPI 6 Buttons- Gray Black Portable Vertical Mouse, Unique Thumb Wheel for Horizontal Navigation and Advanced Gestures with Removable Palm , Encourages Healthy Neutral "Handshake" Wrist and Arm Positions for Smoother Movement and Less Overall Strain, Release Your Wrist 2.4Ghz Wireless Connection Technology, Easy Connections for Multiple Computers, Use with included Unifying Nano Receiver, Plug and Play User Convenience with Wow-pen's Signature, Pen-grip Comfort, Palm Sized, Hand-held Operation, Easy to Use (Please note: Designed for Small Hands, will Not Work for Large/ Tall People) Driver Free 3-mode DPI Shift, 600/1000/1600DPI Adjustable, Adapted to Different Usage Situation, Easy Switching between Computers with the Touch of the Button Scroll Wheel Lifetime: 200,000 Circles and Button Life for 3 Million Times, Compatible with PC Computer Laptop, Windows 8, Windows 7, Vista, XP, ME, 2000, MAC, Linux, Provide Convenience when Webpage Browsing, the Best Choice for Cyber Surfers, Gamers