Overall insights

-Kensinton track ball uses RED OPTICS for cursor accuracy.

-Bluetooth connectivity is a valuable option to have.

[side note: having built in bluetooth electronics rather than having a wireless receiver style connection will increase durability of product (wireless receivers tend to wear or break faster then the mouse itself). however it seems that bluetooth connectivity has feasibility issues like speed and usability.

-left handed people can only use trackball mice the have the ball in the center (Logitech MX Ergo is only for right handed users.

-some come with detachable wrist rests for added comfort

-having vertical scroll wheel action (both horizontal and vertical scrolling if possible) is a feature that users want in a mouse regardless of shape or form.

-tactile response seems to be key for enjoyability of use.

Sources

T. (2020, September 17). Best Trackball Mouse for Gaming and Editing – 2020 Budget & PC & MAC. Retrieved November 25, 2020, from https://www.youtube.com/watch?v=kJC9dpdsxSo

M. (2016, September 11). Kensington Wireless Trackball Review. Retrieved November 25, 2020, from https://www.youtube.com/watch?v=e9QxYYGPhjA