Great for tests, centers, or any activity with a time limit. Use the magnet to attach to a metal surface, or the stand on the back to set on a desk. Digital timer can count up or down, up to 99 minutes and 59 seconds. Display is 2-1/2 x 5/8"; measures 3-3/4 x 2-1/5". Uses one LR44 button battery (included).