Amazon.com Product Description:
The perfect training partner for your active sporting lifestyle, this Casio G-Shock men's digital sport watch (model GW700A-1V) offers a black resin case that's accented by a silver top ring and light digital gray display as well as a black resin strap. It's also solar-powered and wirelessly receives atomic time updates. It offers a 1/100-second stopwatch with a 60-minute measuring capacity and a time recorder with up to 30 records, It also features four independent daily alarms (with one snooze alarm), world time from 30 cities, and an autocalendar (to the year 2039). And because it's solar-powered--charging in either sunlight or indoor light--you'll never have to deal with changing the battery. Other features include a scratch-resistant mineral crystal, AfterGlow LED electro-luminescent backlight, and water resistance to 200 meters (660 feet)--suitable for recreational scuba diving.

This radio-controlled watch receives a time calibration signal transmitted from Fort Collins, Colorado, and signal reception is possible within a radius of about 2,000 miles from the Fort Collins transmitter. You can choose to automatically receive this signal four times a day, or manually update the watch to the atomic clock.