Casio G-Shock GBA-800 STEP TRACKER manual 5554 to set time - YouTube
CASIO 5554 Module - HOW to GBA-800 G-Shock - YouTube
GBA-800-1A | CASIO
I really like my new GBA-800-1AER Module 5554 sporty small and light BT connected g-shock. Great for measuring daily physical activity with step-tracker. Good for walks and runs. : r/gshock