M570 Wireless Trackball Mouse Black

Wireless Bandwidth- 2.4 GHz, Transmission Range- 10 meter, Number Of Buttons- 5, Compatible With- Windows/Mac OS • Work in comfort with a stable, sculpted trackball that supports your hand and lets you rest your arm • The tiny, wireless receiver that stays in your laptop and lets you add compatible devices as you need them • With up to 18 months of use from a single aa, you might just forget your trackball uses batteries at all • Your trackball stays in one place, so you don't have to move your arm to move your cursor • You don't have to unplug it when you move around or worry about losing it and your trackball is always ready to use