Features three-button control and large 1.9 cm (") digits readable from 6m (20') away. -Traceable -Countdown Alarm Timer counts down from 99 minutes, 59 seconds in one second increments. Memory function automatically returns to the last programmed time for repetitive tests. Alarm sounds for 30 seconds. Magnet/stand/clip back. Supplied with two-year AAA alkaline battery.