Wireless keyboard features quiet, wear-resistant keys to prevent the keys from fading through extended use. Four hot keys allow you to quickly access your calculator, e-mail, browser and sleep mode. Plug-and-play technology allows fast, simple installation without installing any software. Three-button mouse fits comfortably in either hand to accommodate both right-handed and left-handed users. 1,200 dpi optical sensor on the mouse ensures smooth, precise tracking. Battery status display in the keyboard and mouse allows you to easily monitor your battery level to prevent unexpected depletion. 2.4 GHz technology provides virtually interference-free performance for trouble-free use.