Keys are labeled with the organizations logo or name. Hitting it once starts the clock, hitting it again stops the click. Time is added to an overall total for each button/org.

The keyboard comes with a simple software that allows programming the keyboard and logging time.

Keys change colors when on/off. Multiple keys can be on at once.

I must be missing some key domain knowledge to not understand why the above isn't used. It's very similar in essence to an old school hole puncher clockin out machine.

I've seen lab techs count different cells using a specialized counter where each button increments a different value while looking down a microscope.

The issue is when you're deep in work you might forget to toggle the switches. Maybe this is the biggest issue.