Logitech Mx Ergo Advanced Wireless Trackball

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 strain CROSS-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 FLOW DUAL CONNECTIVITY - Use with up to three Windows or Mac computers via included Unifying receiver or Bluetooth Smart wireless technology