Stopwatch has 1"-high digits to provide ease in reading. Times to 24 hours. Timing resolution is 1/100 of a second for the first 30 minutes; the stopwatch continues timing to 23 hours, 59 minutes, 59 seconds with a 1-second resolution. Also features single action, time-out, cumulative-split, and continuous timing. As a chronograph, it displays the time of day in hours, minutes, and seconds, and in AM/PM. Also shows date and day of the week and has a time-of-day alarm. Its O-ring-sealed ABS plastic case is water- and shock-resistant and has nonslip rubber sides, making it ideal for lab and plant use.The stopwatch is supplied with a detachable clip for clipping onto notebooks or clipboards, VELCRO^® mounting strips, battery, and lanyard. To assure accuracy, an individually serial-numbered Traceable^® certificate is provided from an ISO 17025 calibration laboratory accredited by A2LA. It indicates traceability to NIST standards.