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
Troubleshooting Module No. 5554/5555 G-SHOCK - Support - CASIO
Casio G-Shock Database
User manual Casio G-Shock GBA-800-1AER (English - 24 pages)