Extra-Extra-Loud Traceable* Timer

100-decibel alarm clearly penetrates high-noise areas. Perfect for high sound zones, indoors and out. Display is 3/4 in. high and permits viewing at a distance. Micro computer chip permits setting two separate channels. Set any time from 99 hours, 59 minutes, 59 seconds to 1 second. Traceable to NIST for accuracy of 0.01% and meets government regulations of ISO 9000 requirements. Magnetic back allows timer to be placed on any metal surface. It also has a flip-open easel for standing. Supplied with two-year batteries. Size is 4 x 2 1/2 x 1/2 in.