Ideal ISO 9000 timer. Countdown alarm. Set up to 20 hours. Easy three-button operation. 1.9cm digits. Alarm sounds for 1 minute. Magnetic/clip back. NIST traceable. Includes battery.
VWR Timing range is 99 hours, 59 minutes, 59 seconds. Resolution is 1 second. Accuracy is 0.01% Two channel Visual LED Alert flip-open easel, clip, and an opening for a lanyard
Tech-Med* Digital Timer, Counts down and up from the max time of 99 minutes, Pocket size and has a spring loaded clip and magnet, 1/2 in Number display, Battery included, Size: 2-3/4 x 2 x 1/2 in