ACCUSPLIT Survivor III S3MAGXLBK Stopwatch with Clock and Extra-Large Display 24-hour timing range, cumulative-split stopwatch Includes time of day, day of week, date, and alarm features Uses Watch Company Operating System (WOS) 2.5 5 Year Battery Life and Water Resistant to 30 meters 5 Year DUAL No Proof and Proof of Purchase Limited Manufacturer Warranty