Casio Duo Solar Black case Green band watch AQS820W-3B

• Accuracy: ±30 seconds per month

5 daily alarms
Hourly time signal

• Battery power indicator

• Full auto-calendar (to year 2099)

• Power Saving (display goes blank to save power when the watch is left in the dark)

LED light
Selectable illumination duration (1.5 seconds or 3 seconds), afterglow

• Button operation tone on/off

12/24-hour format
Regular timekeeping:
Analog: 2 hands (hour, minute (hand move every 20 seconds))
Digital: Hour, minute, second, pm, month, day, 6-language day of the week indicator (English, Portuguese, Spanish, French, German, Italian)

Approx. battery operating time:
10 months on rechargeable battery (operation period with normal use without exposure to light after charge)
23 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)

1/100-second stopwatch
Measuring capacity: 59'59.99''
Measuring modes: Elapsed time, lap time, split time

2 countdown timers
Can be used during interval training that alternates between two different paces.
Measuring unit: 1 second
Input range: 00'05'' to 99'55''
(1-minute increments and 5-second increments)
Other: Auto-repeat (number of repeats settable from 1 to 10)

World time
31 time zones (48 cities + coordinated universal time), daylight saving on/off, Home city/World time city swapping