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%. Special memory chip allows programming an "instant replay" repeat time, which appears on the display at the touch of a key. Individually serial-numbered certificate indicates timer's traceability to NIST standards. Supplied with a Traceable® Certificate and a 3-year AA battery. Size is 3-1/4 x 3-1/4 x 3/4". Weight is 4 ounces.