Contoured shape with soft rubber grips provide all-day comfort 
Back/forward buttons and side-to-side scrolling plus zoom let you do more, faster Requires Logitech Options software 
2-year battery life practically eliminates the need to replace batteries Battery life may vary based on user and computing conditions 
Comes with a tiny Logitech Unifying receiver that stays in your computer - plug it in, forget it 
Wireless operating distance: Approx 10m* ;Sensor Resolution: 1000. USB is stored in the battery compartment of the mouse.