Use this lightweight, portable timer to program three different activities from 1 second to 9 hours 59 minutes 59 seconds. Each channel has a distinct electronic alarm and display indicator. The alarm turns off manually or is silenced automatically after 1 minute. Large ¼ in.-high LCD digits are easy to read. Accuracy is 0.001%. Timer includes a Traceable® certificate (issued by an A2LA-accredited, ISO/IEC 17025 certified lab), which documents traceability to N.I.S.T. standards. Includes two AA alkaline batteries. Dimensions: 3 x 3 x 11/8 in. Wt. 4 oz.