CASIO GBD800UC-8 watch 49.5 mm grey resin 200 m water resistance

Purpose and audience

The GBD800UC-8 is a digital G-Shock built for men who want a tough daily watch with fitness tracking and smartphone linking. Its 49.5 mm resin case and 200 m water resistance suit swimming, outdoor work and heavy knocks. The grey resin band and black dial keep the look neutral for casual or uniform wear. Solar charging means no battery changes for the core functions.

Thermals noise power

Solar power handles the movement, backlight and Bluetooth radio without a mains charger. The Super Illuminator LED offers 1.5 or 3 second illumination on demand or via auto light switch. A power-saving mode puts the acceleration sensor to sleep after inactivity, extending reserve charge. No fan, pump or active cooling exists, so the watch runs silent.

Build integration

The 54.1 x 48.6 x 15.5 mm case fits wrists that accept a 49.5 mm diameter; the resin strap is adjustable and resizable for a secure fit. Mineral crystal and shock-resistant construction protect the module from impacts. Bluetooth mobile link syncs step counts, world time, stopwatch, timer and calendar data to the G-Shock Connected app. Buyers who need a heart-rate sensor or onboard GPS will not find them here.