User-friendly timer displays three different countdown/alarm times simultaneously. Three unique channels may be started individually or concurrently and programmed to count down from 99 hours, 59 minutes, 59 seconds to 1 second. When zero is reached, an alarm sounds, a "Times Up" is displayed, and the timer begins counting up. Memories return the digits to the previously programmed time. Individually serial-numbered Traceable® Certificate indicates timer's traceability to NIST standards. For ease in reading, the digits are 3/8" high. Supplied with a magnetic back, easel stand, Traceable® Certificate, and 1-1/2-year silver-oxide battery. Chemical-resistant ABS case is 2-3/4 x 3-1/4 x 1/2". Weight is 3 ounces. Replacement battery Cat.No. 291-1039.