General-purpose LCD Digital Stopwatch times to 24 hours. Features include: single-action, time-out, cumulative-split, and continuous timing. Timing resolution is 1/100 of a second for the first 30 minutes, and then continues timing to 23 hours, 59 minutes, 59 seconds, with a 1-second resolution. O-ring-sealed and shock-proof ABS plastic case is ideal for lab and plant use. Unit is waterproof to three atmospheres. Tactile-feel, click switches provide a positive action. To assure accuracy an individually serial-numbered Traceable® Certificate is provided from the manufacturer’s ISO 17025 calibration laboratory accredited by A2LA. It indicates traceability to standards provided by NIST (National Institute of Standards and Technology). As a chronograph, the unit displays time-of-day in hours, minutes, and seconds, AM/PM date, and day of the week. Also has a time-of- day alarm. Accuracy is 0.01%. Digits are 1/4-inch-high. Stopwatch is 2-1/8 x 2-3/8 x 1/2 inches and weight is 1 ounce. Supplied complete with 2-year always-on battery and lanyard. Replacement battery Cat. No. CON1039.