Waterproof Digital Swimming 10 ATM Wristwatch with Multiple Functions of Stopwatch, Alarm Clock, Calendar and Backlight

-The waterproof level is 10ATM, this watch can work normally even if it is 100 meters (330 feet) underwater. Its excellent waterproof performance makes it suitable for use in water sports, including diving, snorkeling, swimming, surfing, boating, etc. It is also suitable for hiking, jogging, cycling or other sports activities. -The built-in stopwatch function for lap meets the time needs of coaches or referees for multiple participants in sporting events. -Support multiple useful functions such as: alarm, hourly chime, calendar and backlight. -Support 12-hour or 24-hour format display which can meet different people's time reading habits. -The watch battery is replaceable. If you find that the watch is not working or the text on the screen is not clear, please change the watch battery in time.