Casio has designed the solar-powered Tactical G-Rescue GW7900B-1 to be the ultimate combination of toughness and precision. This model features the ultra-popular multi-band atomic timekeeping technology that automatically receives radio signals to keep world time in optimal calibration. The Full Auto EL Backlight with Afterglow is a G-Shock essential and allows for maximum visibility in no-light conditions. With a moon data tracker, a tide graph and accurate time in 31 time zones, this watch delivers superior functionality in a lightweight, comfortable frame. There is a traditional countdown timer, stopwatch, calendar and several alarms for day-to-day needs. This model also boasts shock and water resistance for serious adventurers. The battery power indicator displays remaining battery life, but this watch can run for nine months consecutively on a single charge without further exposure to sunlight. For a supremely versatile tactical watch, look no further.