Casio G-Shock GW-7900 Earth Watch

Yes, the GW-7900 is part of the Tough Solar lineup and is powered entirely by light using a small solar panel built into the watch face. This eliminates the need for regular battery replacements, provided the watch is exposed to light occasionally. It also features a power-saving function to prolong battery life when left in the dark.

Yes, the GW-7900 features Multi-Band 6 atomic timekeeping, allowing it to receive radio signals from transmitters worldwide. This ensures the watch automatically calibrates its time up to six times a day for absolute precision. This function works in various regions, including the US, UK, Germany, and Japan.

The Casio G-Shock GW-7900 has a water resistance rating of 200 meters (20 Bar). This makes it completely suitable for professional marine activities, serious surface water sports, and snorkeling. However, like most digital watches of this class, it is not recommended for deep scuba diving.

The "Earth Watch" moniker refers to its design and world time functionality, which features illuminated city names and a graphical Earth display to help track time zones. It includes 32 time zones (48 cities + coordinated universal time) and a daylight saving on/off function. The design emphasizes outdoor and global usability.