ERGONOMIC SCULPTED DESIGN - Unique adjustable hinge allows you to customize the trackball angle from 0 to 20 degrees for a more natural, comfortable hand position, and reduced muscle strainCROSS-COMPUTER CONTROL - Game-changing capacity to navigate seamlessly on two computers, and copy-paste text, images, and files from one to the other using Logitech FLOWDUAL CONNECTIVITY - Use with up to three Windows or Mac computers via included Unifying receiver or Bluetooth Smart wireless technologyRECHARGABLE BATTERY - Up to 70 days of power on a single chargePRECISION SCROLL-WHEEL - Tilt and middle click wheel allows for precise scrolling and other convenient controls such as horizontal scrolling
