The Casio Solar Shock- and Water-Resistant G-Shock Watch GW7900B-1 is a timepiece like no other. For one thing, it is solar-powered, rechargeable and holds its charge for nine months without exposure to light. Imagine the performance you will get from this watch knowing how effortless it is to wear without the extra worry and expense of replacing batteries.

In terms of state-of-the-art technology, this water-resistant watch also features multi-band atomic timekeeping. This means it is capable of receiving time calibration radio signals that keep the time accurate. This would be essential for military operators who must make their rendezvous at precise times, or for other survivalists who rely on their timepieces to reach their next destinations.

Perhaps most incredible of all, this solar-powered watch also allows users to calculate moon and tide dates and times, all the while being backlit by a full EL backlight. This watch also contains traditional Casio high-performance features you are used to such as water resistance to 200 meters, shock resistance, international time zones, alarms and a countdown timer.