The Casio AE1300WH-8AV is a digital watch with a rugged design, featuring a wide range of functions including a stopwatch, countdown timer, multiple alarms, and an illuminator backlight for low-light conditions. It's known for its durability and reliability, suitable for various outdoor activities and everyday wear. World time: 29 time zones (48 cities), city code display, daylight saving on/off Stopwatch: Add time timer for injury timeouts, etc. Measuring unit: 1 second (upper and lower display) Measuring capacities: Upper display: 59'59"; Lower display: 99'59" Measuring modes: Elapsed time, event timer Timers: Up to nine timers can be preset with separate starting times for timing of intervals. Measuring unit: 1 second Input range: 59'55. (5-second increment and 1-minute increments) Other: Auto-repeat Preset timer Measuring unit: 1 second Preset start times: 10, 12, 15, 20, 25, 30, 35, 40, 45 minutes Timer modes: Elapsed time, auto-repeat *Measurement of elapsed time for up to 60 minutes after the countdown reaches zero Alarm/hourly time signal Daily alarm Hourly time signal Light LED backlight Afterglow Light color LED:Amber Calendar Full auto-calendar (to year 2099) Mute feature Button operation tone on/off Accuracy Accuracy: ±30 seconds per month Other features 12/24-hour format Regular timekeeping: Hour, minute, second, pm, month, date, day