sdjgShock Resistant Magnetic Resistant 200 Meter Water Resistant Auto LED Light with Afterglow World Time 29 times zones (48 cities + UTC), daylight saving on/off, home city/world time swapping 4 Daily Alarms and 1 Snooze Alarm Hourly Time Signal 1/1000 Second Stopwatch Measuring capacity: 99:59'59.999" Measuring modes: Elapsed time, lap time, split time Others: Speed (0-1998 units/hour), Selection distance input (0.0-99.9) Countdown Timer Measuring unit: 1 second Countdown range: 24 hours Countdown start time setting range: 1 minute to 24 hours (1-minute increments and 1-hour increments) Other: Auto-repeat Full Auto-Calendar (pre-programmed until the year 2099) 12/24 Hour Formats Accuracy: +/- 15 seconds per month Battery: CR1220 Approx. battery life: 2 years Module 5081