Keypads should be simple and easy to use, but they often are not. The buttons are inconsistently responsive and there’s always at least one other key you have to press, often two. And those other two are named whatever the designers decided and placed wherever the thought would be most confusing.

“Okay, I want to cook for 3 minutes.”

‘300’

”Ok, the numbers don’t work until I press something else. Hmmm”

‘Time Cook’ ‘400’

“Shit. I hit the 4. Where’s the cancel?

‘Cancel’ ‘Time Cook’ ‘300’

“Where’s the start?”

‘Start’