Introducing the amazing G-Shock Solar Bluetooth GSTB100D-1A9 G-Steel Watch, a perfect blend of toughness and cutting - edge technology. It sports a strong resin/stainless steel case and a solid stainless - steel band, making it shock - resistant and waterproof up to 200 meters. Powered by the efficient Tough Solar tech, it connects to your smartphone via Bluetooth® effortlessly. This gives you easy access to features like mobile link and automatic time adjustment. With its sleek look and advanced functions, it's an ideal accessory for an active lifestyle. The watch has a case size of 58.1 × 53.8 × 14.1mm and weighs 185g. It comes with a resin/stainless steel case and bezel, a solid stainless - steel band, and a one - touch 3 - fold clasp. It features a mineral glass, a screw lock crown, and offers world time with dual - time swapping. Other functions include a stopwatch, countdown timer, alarm, hourly time signal, and a super - bright LED light. The full auto - calendar runs until 2099. It has an energy - saving power - saving mode and a battery - level indicator. The battery can last up to 5 months with normal use after a charge and 24 months in total darkness with power - save on. Its accuracy is ±15 seconds per month without the mobile link function. It offers analog timekeeping with 3 hands and 3 dials, along with date and day displays.

Using this G - Shock watch is a breeze. To connect it to your smartphone, turn on Bluetooth on your phone and follow the instructions in the app. For time adjustment, you can either use the automatic mobile link feature or adjust it manually. When setting the world time, you can easily swap between home and another city. To use the stopwatch and countdown timer, just press the relevant buttons on the side of the watch. The alarm and hourly time signal can be set in the settings menu. As for the LED light, press the designated button to illuminate the watch face. When it comes to maintenance, keep the watch away from extreme temperatures and magnetic fields. Wipe it with a soft cloth regularly to keep it clean. If the watch is exposed to water, dry it thoroughly. In case you don't use the watch for a long time, turn on the power - saving mode to conserve battery life. Also, remember that the battery needs to be recharged periodically, so expose it to light regularly to keep it running smoothly.