18-month battery life Work、 play、 connect and create without worry. M280 automatically puts itself to sleep when you're not using it. Smooth and precise tracking Enjoy smooth cursor control、 precise tracking and easy text selection thanks to Logitech Advanced Optical Tracking. Plug-and-forget nano receiver Plug it once and forget it. The tiny wireless receiver practically disappears in your computer's USB port or stores inside the mouse when you're not using it.