Timex Women's Marathon Radio Control Atomic Watch. The Timex T5G341 radio-controlled digital watch provides always accurate time because it synchronizes with the Atomic Clock via radio signals (in the US, Japan, Germany, and the United Kingdom). It has a durable silver resin case, black nylon Fast Wrap strap (with Velcro fastener), and an all-day white reflector display. Timekeeping features include a 100-hour chronograph with lap/split option, pre-programmed auto calendar, date alert when set date is reached, and 25 selectable time zones with daylight savings time. Other features include a low battery indicator and water resistance to 50 meters (165 feet)