Review on Renewed Logitech MX ERGO Advanced Wireless Trackball for Windows PC and Mac by Aravind Joshi

Works straight out of the box, this was a plain white box with a label. In addition to the mouse and disk, the box contained a warranty, a battery information sheet and a plus wedge. At the bottom of the attached sign was a sticker directing the user to go to their website from which the necessary software can be downloaded. Wedge options are 10 degrees, 20 degrees, or 30 degrees - I was hoping for a wider range, but found that toggling between 10 and 20 helped tire the mouse. Obviously people don't know that this is related to the 90% guarantee and you need to download the software on each device to use its full potential.