High Definition optical technology - more precise, more responsive, and deliver smoother tracking. 6+ months battery life - work with less interruption with longer battery life. Wireless freedom - give yourself room to move with a wireless mouse and keyboard that lets you work without worrying about tangled wires. Snap-in Receiver - plug in the snap-in receiver when you're ready to work, then snap it into your mouse when your ready to travel, preserving battery life. Comfortable in either hand - ambidextrous design. Designed for notebook PCs - compact and comfortable, designed for convenience and mobility. 3-button mouse - get quick access to the media, programs and files you use most often. Ergonomic design