m710B optical The optical sensor technology is one of the most significant upgrades by computer mice. Through the replacement of the control ball and all other movable parts, which were in the past necessary for the movement, now the optical mouse is nonwearing and more precise than a normal mouse with control ball ever will be. Features: No incalculable mouse movements anymore The optical sensor gives 800 signals per second to the digital signal processor, whereby unwanted jumps will be avoid, which appear by normal mice with control ball. No cleaning necessary Through the economise from moveable parts you haven´t any pollution, which makes the optical mouse almost maintenance-free. No mouse pad necessary The mouse is so accurate that it can be used on almost every flush surface. Easy side navigation The scroll wheel allows you to browse and search easily in documents and in the World Wide Web. Specifications:Plug and Play with USB connector OS support: Windows 98 / ME / 2000 / XP / Vista / 7, Mac OS Dimension: 103 x 69,5 x 36mm Weight mouse: 71g Weight retail: 89g Cable length: 1,25m