Extech STW515 Stopwatch/Clock with Backlit Display

Stopwatch Modes: Elapsed Timer, Split Time, and Two Competitor Timer; Clock Mode: 12 or 24 hour clock format and programmable alarm, hourly chime setting, and 5min alarm snooze option Timing capacity: 23 hrs, 59 mins, and 59.99 secs; Basic accuracy: 3 seconds/day 1/100th second resolution for 30 minutes; 1 second resolution up to 24 hours Calendar displays day, month and weekday Water resistant housing and backlit display with auto off after 5 seconds