Timer counts down from 99 minutes, 59 seconds in second increments with 3-button ease and big-digit visibility. Automatic memory resets the display to the last programmed time—ideal for repetitive tests. Quartz-crystal accuracy to 0.01%. Individually serial-numbered Traceable® Certificate indicates timer's traceability to NIST standards. 3/4"-high digits are readable from 20 ft. Alarm sounds for 30 seconds. Size is 2-1/2 x 2-1/2 x 1/2". Weight is 2 oz. Supplied with 2-year AAA battery, magnet, stand, clip, and Traceable® Certificate.