Use our timer to perform countless repetitive tests or 2 tests at once. Its 2 countdown timing channels may be started simultaneously and set to recall a specific time. As each countdown time expires, an alarm sounds and a visual “Time’s Up” message appears. At zero, the display will begin counting up. Timer may be set in hours/minutes/seconds to 23 hours, 59 minutes, 59 seconds. Timer includes a Traceable^® certificate (issued by an A2LA-accredited, ISO 17025-certified lab), which documents traceability to NIST standards. Magnet, flip-open stand and clip are also included. Dimensions: 2-3/4" x 2-1/8" x 7/8". Weight: 1.9 oz.