Timer functions can count up or down, and pre-programmed Quick Set keys (in 1-, 5- and 10-minute intervals) save you preparation time. The program button is customizable to your favorite time. Large LCD displays a graphic representation of time passing as well as a numerical count for reinforcement. Tone signals when time runs out. Measures 2.5 in H x 8 in W x .75 in D. Requires 1 AAA battery, not included.