Use this timer to perform countless repetitive tests or two tests at once. Its two 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/IEC 17025-certified lab), which documents traceability to N.I.S.T. standards. Magnet, flip-open stand and clip are also included. Dimensions (W x H x D): 2¾ x 21⁄8 x 7⁄8 in. Wt. 1.9 oz.