The Casio AQ-S810W-1A2VEF combines sporty style with practical functionality. Powered by Tough Solar technology, this analogue-digital watch features 100m water resistance, World Time across 31 time zones, a 1/100-second stopwatch, dual countdown timers and five daily alarms. The durable resin design and LED light make it ideal for everyday wear, travel and active lifestyles.

Features:

• Current time in 48 cities (31 time zones + coordinated Universal Time), daylight saving on/off, Home city/World time city swapping

Stopwatch:

• 1/100-second stopwatch
• Measuring capacity: 59'59.99''
• Measuring modes: Elapsed time, split time, 1st-2nd place times

Timer:

• 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: Number of repeats settable from 1 to 10

Alarm/hourly time signal:

• 5 daily alarms 
• Hourly time signal

Light:

• LED light (LCD part only)
• Selectable illumination duration (1.5 seconds or 3 seconds), afterglow

Light Colour:

• Amber

Calendar:

• Full auto-calendar (to year 2099)

Mute Feature:

• Button operation tone on/off

Energy saving feature:

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

Battery display/alert:

• Battery power indicator

Run Time:
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)

Accuracy:

• Accuracy:±30 seconds per month

Other features:

• 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)

Exterior:

• Glass: Resin Glass
• Other: Neobrite
• Band: Resin
• Case & bezel: Resin
• Weight: 40g

Water resistance:

• 100-metre water resistance

Power Supply:

• Solar Powered