Casio G-Shock G-Steel GST-B400-1AER Men's Watch • Tough Solar • Bluetooth

The Casio G-Shock G-Steel GST-B400-1AER men's watch sets new standards in robustness and design. Thanks to the innovative Carbon Core Guard structure, this model is the slimmest watch in the G-STEEL series to date, without sacrificing shock resistance. The striking case made of stainless steel and resin reliably protects the precise internal workings from external influences.

Equipped with state-of-the-art technology, this wristwatch offers seamless smartphone connectivity via Bluetooth and environmentally friendly power supply through the proven Tough Solar system. Whether in everyday life or during sporting adventures – this watch is the perfect companion for men who value functionality and a masculine look.

Special features of the Casio GST-B400-1AER watch

• Carbon Core Guard: A carbon-reinforced case enables an ultra-slim profile with extreme durability.
• Tough Solar: Integrated solar cells convert even weak light into energy, eliminating the need for battery changes.
• Smartphone Link: Thanks to Bluetooth, the watch can be easily paired with a smartphone to precisely control time, location, and functions.

Care Instructions for Wristwatches

Care & Cleaning

• Daily: Wipe case and strap with a soft, dry cloth to remove dirt and sweat.
• Water-resistant watches: Clean with mild soapy water and a soft brush, rinse, dry thoroughly.
  Important: Screw crown in tightly beforehand!!!
• Not waterproof: Clean only dry or slightly damp, do not use water or cleaning agents.
• Avoid: Aggressive agents, perfume, cosmetics, and heat.
• Leather straps: Do not soak, clean only slightly damp, and let dry away from heat.
• Water resistance: Do not wear when showering or bathing, have it checked annually.
• Battery (Quartz): Have a dead battery replaced immediately.
• Mechanical watches: Service by a master watchmaker every 5 years.

Storage & Handling

• Store watches separately, not directly with other jewelry (risk of scratches).
• Remove mechanical watches when winding, do not leave crown pulled out.

Jewellery Care – How to Keep Your Jewellery Beautiful:

• Remove jewellery before showering, bathing, and sports.
• Avoid direct sun – wood, leather & co. can fade.
• Hands off – constant touching leaves grease and dirt.
• No aggressive cleaning agents like chlorine, salt water, or disinfectants.
• Apply cosmetics and perfume first, then put on jewellery.