The Casio AQS810W-1AV Tough Solar is a durable, solar-powered watch with a sleek black resin case, dial, and strap. With a 52.2 × 48.3 × 13.7mm case and a lightweight 40g design, it offers 100-meter water resistance for outdoor and water activities. The watch features World Time with 31 time zones, two countdown timers, a 1/100-second stopwatch, and a full auto-calendar. Other key features include an LED light with adjustable duration, energy-saving mode, alarms, and a solar-powered battery with up to 23 months of run time in power-saving mode. The watch combines analog and digital displays, provides multi-language day indicators, and has an accuracy of ±30 seconds per month. Ideal for active lifestyles, the AQS810W-1AV is a reliable and versatile timepiece. - Resin Band, Bezel, and Case with a 52.2 × 48.3 × 13.7mm size and 40g weight - 100 Meters Water Resistance - World Time: 31 time zones (48 cities + UTC), daylight saving, and city swapping - Timers: 2 countdown timers (1s increments, 00'05" to 99'55"), repeatable 1-10 times, ideal for interval training - LED Light: Selectable duration (1.5s or 3s), with afterglow - Full Auto Calendar (until 2099) - Energy Saving: Power-saving mode (display blanks in the dark) - Stopwatch: 1/100-second, measuring capacity of 59'59.99" - Solar Powered with approx. 10 months run time (normal use) or 23 months (in power-save mode) - Accuracy: ±30 seconds per month - 12/24-Hour Format with analog (hour, minute hands) and digital (hour, minute, second, date) displays - Alarm/Hourly Time Signal