---
type: product
title: Casio AQ-S820W-1AVEF Tough Solar Watch
handle: casio-aq-s820w-1avef-tough-solar-wristwatch
url: https://www.hsjohnson.com/products/casio-aq-s820w-1avef-tough-solar-wristwatch
sku: AQ-S820W-1AVEF
price: '4600.0'
currency: GBP
tags:
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  - in_stock
  - Mens
collections:
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    price: '46.00'
    sku: AQ-S820W-1AVEF
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---

Powered by dependable Tough Solar technology, this classic CASIO timepiece offers dual countdown timers, a stopwatch, five daily alarms, and world time capabilities. Designed for resilience, it boasts a sturdy resin case and water resistance up to 100 meters, making it ideal for demanding environments.

**We are a Casio UK authorised dealer**  
**New boxed stock with full retail boxes & paperwork**

**Basic Information**  
Case size (L× W× H)  
52.5 × 50.1 × 12.7 mm  
Weight  
46 g  
Case and bezel material  
Resin  
Band  
Resin Band  
Water resistance  
100-meter water resistance  
Power supply and battery life  
Solar powered  
Country of origin  
China  
**Exterior**  
Glass  
Resin Glass  
Compatible band size  
145 mm to 215 mm  
**Watch Features**  
World time  
31 time zones (48 cities + 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, lap time, split time  
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: Auto-repeat (number of repeats settable from 1 to 10)  
Alarm/hourly time signal  
5 daily alarms  
Hourly time signal  
Light  
LED light  
Selectable illumination duration (1.5 seconds or 3 seconds), afterglow  
Light color  
LED: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 is 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)