What is the minimum FPS that FreeSync and G-sync systems require to work?

Question

Monitors

Hello.
I'm interested in the question: with what FPS, which is lower than the screen refresh rate, do FreeSync and G-sync systems work?
Let's say if I buy a 144Hz monitor with one of the above technologies, will I be able to play a game that my PC only runs at 60 FPS? Will the monitor be able to reduce the refresh rate and adjust to such a low FPS?
There is not a word about this in the characteristics of the monitors.

Answer 1

Yes, he can.