CDN White Mechanical Timer

No buttons to push or detailed instructions to read -this good old-fashioned mechanical timer just requires one turn of the knob and it begins to count. Wind it at least past 30 minutes and then back to the desired setting; the closer to 60 minutes the knob is turned, the longer the ring will last, up to three seconds. The timer ticks audibly to let you know it's working, and the ring is loud enough to be heard in the next room. Measuring 3 by 3-5/8 inches, the sloped front is easily observed on a countertop, while a notch on the back allows the option of wall-mounting. CDN covers the timer with a 5-year warranty against defects

Mechanical wind-up timer counts 1 hour by minutes
Just one knob to turn, making it simple to use
Rings for 3 long seconds
Sloped front reads easily on countertop; notch lets it be wall-hung
5-year warranty