The wireless ValuMouse is ideal if you're looking for a comfortable mouse that won't add to the clutter of cables on your desk. The combination of three buttons plus a scroll wheel allows you to click without clicking, so you can get your work done without disturbing others. A highly sensitive optical sensor ensures reliable, precise control, and its comfortable shape, suitable for right- and left-handed users, means the mouse fits comfortably in the hand. It offers plug & play installation through a 2.4 GHz USB nano receiver and is very durable (five year guarantee). Click-free for quiet work environments 2.4 GHz wireless technology and stowable nano receiver Rounded shape equally suitable for right- and left-handed people Highly sensitive optical sensor (1000dpi) for precise control Mouse with three buttons and scroll wheel Plug & Play installation with USB nano receiveron/off switch and low battery indicatorVery durable (five year warranty)Compatible with Windows® 8.1, 8, 7 and Mac OS X