Traceable lab-top timer. Lab-Top Timer is built expressly for bench use. LCD screen is designed for viewing at any angle (sitting or standing). Ease of operation, versatile timing modes, extra-large keys, and the any-angle viewing make this unit ideal for the lab. Counts down from 24 hours to 1 second, in second increments, with an accuracy of 0.01 percent. Special memory chip allows programming an instant replay repeat time which appears on the display at the touch of a key. Memory time is locked in until changed. Unit features a time-up (stopwatch) mode and a time-of-day clock. To assure accuracy an individually serial-numbered traceable certificate is provided from our ISO 17025 calibration laboratory accredited by A2LA. It indicates traceability to standards provided by NIST (national institute of standards and technology). Supplied with a traceable certificate and a 3-year AA battery. Size is 3-1/4″ x 3-1/4″ x 1-3/4″.