The Casio GW7900B-1 sports stopwatch combines the high precision of solar powered atomic time, Japanese quartz movement, and high-frequency electronics with the ruggedness of a resin epoxy band and case.

Made in the USA, this is an extremely accurate stopwatch measure up to one-hundredth of a second, which makes it a preferred stopwatch for coaches, trainers, and others involved in athletics at a serious level who need to know exactly how fast it took someone to cross the finish line or perform a drill.

Additionally, this watch from Casio is encased with 55 mm of hard epoxy resin, allowing it to easily stand up to even the most gruelling outdoor conditions faced by triathletes, hunters, and others who need a high-performance solar stopwatch for outdoor use.

This includes durability even while fully submerged under water. The Casio GW7900B-1 Watch is water resistant and withstands the pressure in depths of up to 200 meters, which makes it suitable for all serious marine activities and water sports (with the exception of Scuba Diving).

The band is moulded around a 15.5 mm and 48 mm diameter case, and the band comes together with a form fitted hard epoxy buckle. As such, you ought not ever to have to worry about the watch inadvertently snagged on anything and being pulled loose.

Aside from the daily alarm with snooze option and the 12 and 24 hour formats that are common to all sports stopwatches, the Casio GW7900B-1 also features lunar tide graphs, yearly calendars, world time in 48 cities across 31 different time zones, and other metrics that are all easily accessible and viewed through a precision fabricated mineral dial window.

The Casio GW7900B-1 high-performance sports stopwatch comes in standard men’s sizes and basic black for both the band and the dial case. A two-year warranty is provided by the device insurance provider Asurion.