This digital stopwatch times up to 23 hours, 59 minutes, 59 seconds with 1/100-second resolution and rated accuracy of +/-3 seconds per day, and it can capture split times alongside the running clock. Its high-contrast LCD also shows hour, minute, second, and day of week, backed by a programmable alarm with snooze. Rated IPX4 water-resistant, powered by a CR2032 battery, and supplied with a 48-inch nylon lanyard, this unit includes a traceable NIST calibration certificate.