Amazon is offering
Logitech MX Master Wireless Mouse, Large Mouse, Computer Wireless Mouse for $59.99 in limited time, shipping is free
Unique thumb wheel: For horizontal navigation and advanced gestures
Easy connections for multiple computers: Use with up to three Windows or Mac computers via included Unifying receiver or Bluetooth Smart wireless technology
Easy switching between computers with the touch of the button
Tracks virtually anywhere - even on glass: The Dark field Laser sensor tracks flawlessly even on glass and high-gloss surfaces (4mm minimum thickness)
Advanced power management: Up to 40 days of power on single charge. You can get enough power for a full day of usage in only 4 minutes, with no downtime while recharging. ( Battery life may vary based on user and computer conditions)
