This pocket timer has a four-digit LCD display that 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. It also has a time-out feature in both up and down counting. Digits are 1⁄3 in.-high for ease in viewing. The timer includes a rugged chemical-resistant ABS case, keychain and 1½-year continuous-use replaceable silver oxide battery. A certificate is provided to indicate instrument traceability to standards provided by the N.I.S.T. Calibrated by an ISO/IEC 17025 calibration laboratory accredited by A2LA.