?Ergonomic Design Reduces Wrist Pain?VicTsing vertical ergonomic mouse dedicate to improving and alleviating hand fatigue. The ergonomic mouse adopted the exclusive 54° vertical angle encourages a healthy wrist and forearm posture which reduces muscle strain. You just take short time to get used to the ergonomic mouse ?Multifunctional Buttons Improves Efficiency?4 levels of DPI 1000/1600/2000/2400 allow you to change the cursor speed easily. The forward/backward buttons help you being quick to browse the page vertically (Mac not applicable). Our VicTsing vertical ergonomic mouse is designed to increase your work efficiency! ?Low Energy Consumption Prolongs Lifespan? Two 1.5V AAA batteries Needed(Not included) and low current consumption renders the vertical mouse long battery life. This wireless ergonomic mouse also automatically enters into power-saving mode after 10 minutes’ inactivity. Press any button to wake it up at any time ?Smooth & Lightweight Design for Easier Handle?This VicTsing wireless ergonomic mouse is equipped with skin-friendly materials and designed with upgraded programming technique. Thus it is suitable for most hand shapes and size. Click with no noise and effortlessly, move with no lag and responsively ?Easy to Install on Computer?Insert the batteries, switch on the power button. Plug the nano USB receiver from on the bottom of mouse into computer and Play! Our VicTsing vertical ergonomic mouse works with your desktop and PC, Windows XP/ Vista/ 7/ 8/ 10/ Linux, Mac OS X. Meet all your needs and participate your daily work easily!