Large 3/4"-high display permits viewing from across the lab. Its microcomputer chip permits setting four separate channels. Set any countdown time from 99 hours, 59 minutes, 59 seconds to 1 second. When zero is reached, the timer starts counting up to show time elapsed since alarming. Additional features include stopwatch, time-out, and time-of-day clock. All four channels may be used simultaneously in any combination to count down or count up (stopwatch). Individually serial-numbered Traceable® Certificate indicates traceability to standards provided by NIST. Magnetic back allows timer to be placed on any metal surface, such as incubators or water baths. Accuracy is 0.01%. Supplied with a 2-year, silver-oxide battery. Size is 2-3/4 x 2-1/2 x 1/2". Weight is 2 ounces. Replacement battery Cat.No. 291-1039.