Microsoft Wireless Desktop 800 USB Keyboard & Mouse - 2LF-00001

Secured wireless connection - Microsoft 2.4 GHz wireless delivers a secured and reliable connection with up to a 15-foot range.
Easy-access hot keys - Quickly access Calculator, volume controls, mute, and play/pause.
Microsoft Optical Technology - 1000 dpi provides responsive cursor control.
Snap-in transceiver - Stows conveniently under the mouse.
Optimized power management - Power management system extends battery life.