SmartTime™ Digital Timer is great for testing, games, TV/video game time, cooking, general classroom time management, and more. Measures 4" x 3" overall, with a large screen size. Features 4 quick pre-sets for repetitive timing. Set your own desired time by repeatedly pressing the buttons. Alarm sounds when time is up. Includes magnets, hook and built in stand on the back. CR2032 button battery included.