This general-purpose LCD digital stopwatch times to 24 hours and features single-action, time-out, cumulative-split and continuous timing. Timing resolution is 1⁄100 of a second for the first 30 minutes, then continues timing to 23 hours, 59 minutes, 59 seconds with a 1-second resolution. The timer has an O-ring-sealed and shock-resistant ABS plastic case that is ideal for lab and plant use. It is waterproof to three atmospheres and has tactile-feel click switches that provide a positive action. As a chronograph, the stopwatch displays time-of-day in hours, minutes and seconds, a.m./p.m., date and day of the week. It also has a time-of-day alarm. Accuracy is 0.01%. Digits are ¼ in.-high. Dimensions (W x H x D): 21⁄8 x 21⁄8 x ½ in. and weighs 1 oz. Supplied with a two-year “always-on” battery and lanyard. An individually-serial-numbered Traceable® certificate is provided from an ISO/IEC 17025 calibration laboratory accredited by A2LA. It indicates traceability to standards provided by N.I.S.T.