55 minute timer. To set timer, turn dial clockwise to 55 minute mark, then turn dial back counter-clockwise to desired time. Size: 3.25" x 2.75" x 1.4". Set your timer, start cooking, and move on to other tasks while your food is timed perfectly. You'll be alerted with a resounding ring once your recipe is done. Stand it up on your counter, or use the magnetic back to stick to your refrigerator. Construction: Enameled steel, plastic, stainless steel, magnetic back. Wipe clean with a damp cloth.