This Traceable® alarm timer includes a memory that will retain the setting. You can program it to count down from 24 hours to 1 minute in 1-minute increments. Accuracy is 0.01%. Bright 1⁄3 in.-high LCD digits read in hours, minutes and seconds (seconds displayed during the last 10 minutes). Loud, beeping alarm can be turned off manually or is silenced automatically after 1 minute. Three-button operation makes it simple to use. Pocket-size unit has a clip, magnet and stand for flexibility. Supplied with a two-year, replaceable silver oxide battery. An ISO/IEC 17025 individually-serial-numbered Traceable® certificate is supplied to indicate instrument traceability to standards provided by N.I.S.T. Dimensions (W x D x H): 2.35 x 0.85 x 2.6 in. Wt. 1 oz.