Logitech 910-002533 Wireless Ambidextrous Optical Mouse  (USB, Blue)

Contoured shape with soft rubber grips provide all-day comfort. Back/forward buttons and side-to-side scrolling plus zoom let you do more, faster Requires Logitech SetPoint software. 2-year battery life practically eliminates the need to replace batteries Battery life may vary based on user and computing conditions. Comes with a tiny Logitech Unifying receiver that stays in your computer - plug it in, forget it. Works with Windows and Mac OS.