Energizer Watch/Electronic Batteries, 3 Volts, 2032, 2 batteries (Lithium Button Cell)
It 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 (once per day at 1 AM) or manually update the G-Shock to the atomic clock. It's solar-powered--charging in either sunlight or indoor light--so you'll never have to deal with changing the battery. It offers water resistance to 200 meters (660 feet), suitable for scuba diving.

| Country | USA |
| Brand | Casio |
| Manufacturer | Casio |
| Binding | Watch |
| ItemPartNumber | GW300A-1V |
| Model | GW300A-1V |
| UPCs | 079767768768 |
| EANs | 0079767768768 |
| ReleaseDate | 0000-00-00 |