Casio G-LIDE Watch - Black - GBX-100-2A

Yes, it features a 200-meter water resistance rating, making it suitable for surfing, swimming, and skin diving.

No, the watch functions perfectly as a standalone timepiece; the app is only required for advanced tide data configuration and activity logs.

This model focuses primarily on surf-related data and activity metrics rather than advanced sleep stage tracking.

Under normal usage conditions, the watch is designed to run for approximately two years before requiring a battery change.

Yes, it provides sunrise and sunset data based on your geographic location synced through the app.

The stainless steel bezel is durable, but repairs or replacements should be handled by an official service center to maintain water integrity.

Ensure Bluetooth is enabled on your phone and the watch is in pairing mode. Forget the device in phone settings and retry the connection.

Update the location data through the CASIO WATCHES app to ensure your coordinates and tide offset are properly calibrated.

The battery may be low. Ensure you are not in a power-saving mode and consider having the battery replaced by an authorized service center.