Four-digit LCD always shows the time remaining in hours and minutes. Program it in 1-minute increments from 20 hours to 1 minute. At zero, a beeping alarm sounds for 60 seconds or may be silenced manually. In the stopwatch mode, it times from 1 second to 20 minutes and then rolls over. Also has a timeout feature in both up and down counting. Digits are 1/3-inch-high for ease in viewing. Three-key operation is fast. Resolution is 1 minute and quartz-crystal accuracy is 0.01%.
To assure accuracy an individually serial-numbered Traceable® Certificate is provided. It indicates traceability to standards provided by NIST (National Institute of Standards and Technology). Also supplied with rugged chemical-resistant ABS case, key-chain, and replaceable battery.