Logitech MX Master Wireless Rechargeable Laser Scroll Mouse 910-004337 Smart speed-adaptive scroll wheel: Auto shift from click-to-click to hyper-fast scrolling 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.)