Put the years of work using a traditional mouse you have no feeling when working wrist pain， feeling bored? There is no attempt to change a new concept thought vertical vertical ergonomic mouse do? Because it is based on ergonomics and design， vertical design， prevention of the mouse hand. Meet your office needs， alleviate wrist fatigue， correct grip position; is a really healthy mouse!Color: BlackShell Material: PlasticQuantity:1Product Features��1.The design fashion and novel， unique appearance can attract eyeba��2.Accord with human body engineering design， can effectively prevent the mouse hand;3.Can meet the demand of office， games.Parameter��Interface: USB (Cable 1.5m/5ft)Resolution: 800dpiButton: 4 buttons in default / 1 scroll wheel (middle button)Operation System required : Windows 98/Me/2000/XP/Vista/Win 7Packing List:1 x Mouse， 1 x USB Cable(150cm)