GBA-800 - module 5554 - Detailed Tutorial on how to setup and use all the functions - watch only - YouTube
CASIO G-SHOCK - ➡️ GBA-800 Series with Bluetooth® Connectivity; engineered for sports activities : Linking with the G-SHOCK Connected phone app provides access to a number of functions to support your workouts.
Casio G-Shock GBA-800 Watches With Fitness Tracking | aBlogtoWatch