Multi-function sport watch featuring 10-year battery, world map, world time (31 time zones, 48 cities), stopwatch, timer, alarms, and auto-calendar (to year 2099). Go 10 years without changing a battery! Advanced technology extends the battery life in this AE2100W series so you can enjoy the timekeeping and other functions for a decade without shopping for a new battery! In addition to the extended battery life you can also enjoy the World Map, LC Analog Display along with being 200M water resistant. You will also find the 24 hour stopwatch and timer useful for your daily exercise and fitness needs.