What is the solution for equipping a meeting room with a countdown timer?

Question

Do it yourself

There is a meeting room where daily limited-time meetings are held. I want to keep track of time conveniently, for this you need a countdown timer. I can't find a ready-made solution that meets the following requirements:
1. Wall / desktop version, with dimensions from 20*20cm.
2. Easy-to-read font size.
3. Remote timer control: time setting, start, stop.
Has anyone come across similar devices?
I would be very grateful if only for a direction to search!

Answer 1

Cheap tablet. From 2.5k rubles.

Answer 2

Bickford cord + dynamite.

Answer 3

chess clock

Answer 4

regular kitchen timer?

Answer 5

If you, or someone nearby, have straight arms, then you can do it yourself (at the same time writing an article on Habr). To do this, you need Andruino and segment indicators. Indicators are available in various sizes, ranging from 5x10 mm, ending with half a meter , and maybe more. So you can make any size you want.