TEKMAGIC Sports Wrist Watch 10 ATM Waterproof for Swimming and Diving with Lap Stopwatch, Alarm Clock, Calendar, Backlight, 12 or 24 Hours Format, Strap.

- The water resistance is 10 ATM, so the watch works normally even at 100 metres (330 ft) depth underwater. The excellent waterproof rating makes it suitable for water sports such as diving, snorkeling, swimming, surfing, boating, etc. It is also suitable for wearing during hiking, jogging, cycling or other sports activities. -The integrated lap stopwatch function meets the timing needs of coaches or referees at multi-participant sporting events. -Supports multiple useful functions such as: alarm clock, hourly chime, calendar and backlight. -Supports display in 12 or 24 hour format to meet different time reading habits of different people. - The battery of the watch is replaceable. If you find that the watch does not work or the text on the display is not clear, please replace the battery of the watch in time.