The Casio AE1400WH-1A digital watch is a remarkable timepiece. It has a robust 48.4 × 51.4 × 14.4mm case and weighs only 49g, ensuring a comfortable fit on your wrist. The band, bezel, and case are made of tough resin, making it reliable in all sorts of situations. With a water resistance of up to 100 meters, it's perfect for water - related activities. Powered by a CR2025 battery, it offers an amazing battery life of around 10 years. The resin glass provides clear visibility. This watch has an extensive world - time feature. It can show multi - time for four different cities and covers 31 time zones across 48 cities, along with coordinated universal time, daylight - saving adjustment, and the ability to switch between home and world time. Other great features include a stopwatch, timer, alarm with hourly time signal, and the choice of five daily alarms or one - time alarms. It also has a full auto - calendar until 2099 and a mute function for button operation tones. It maintains an accuracy of ±30 seconds per month and supports both 12/24 - hour formats, with regular time - keeping features like hour, minute, second, PM, month, date, and day displays. - 48.4 × 51.4 × 14.4mm Case Size - 49g Weight - Resin Band, Bezel and Case - 100 Meters Water Resistant - Approx. battery life: 10 years on CR2025 - Resin Glass - World time: Multi Time (4 different cities) - World time: 31 time zones (48 cities + coordinated universal time), daylight saving on/off, Home city/World time city swapping - Stopwatch - Timer - Alarm/hourly time signal - 5 daily alarms or one - time alarms - Calendar: Full auto - calendar (to year 2099) - Mute feature: Button operation tone on/off - Accuracy: ±30 seconds per month - 12/24 - hour format - Regular timekeeping: Hour, minute, second, pm, month, date, day

Using your Casio AE1400WH - 1A watch is a breeze. To set the time, find the adjustment buttons on the side of the watch. You can easily switch between the 12 - hour and 24 - hour format according to your preference. For the world - time feature, select the cities you want to track. You can also adjust the daylight - saving time and swap between your home city and world - time cities. The stopwatch and timer are handy for timing events. Just press the relevant buttons to start, stop, or reset them. When it comes to alarms, you can set up to five daily alarms or one - time alarms, and there's an hourly time signal too. You can turn on or off the button operation tones using the mute feature. As for maintenance, this watch is water - resistant up to 100 meters, but it's still a good idea to dry it thoroughly after it gets wet. The battery lasts about 10 years, but when it starts to run out, take it to a professional to replace the CR2025 battery. Keep the watch clean by wiping it with a soft cloth regularly. Also, avoid exposing it to extreme temperatures or harsh chemicals to keep it in good condition.