1. Material: ABS+TPU+304L stainless steel 2. Display diameter: 41mm 3. Watch strap: 22mm 4. Watch sports data: save for 31 days 5. High power consumption state: more than 15 months 6. Regular power consumption status: more than 29 months 7. Energy-saving use status: more than 29 months 8. Waterproof level: 5ATM (or IP68) 9. Working voltage: 3.0V 10. Battery model and capacity: CR2032 (capacity 220mAh) 11. Sports step counting: Accurately record the number of walking/moving steps 12. Calories: Accurately record exercise consumption 13. Countdown: better grasp the rhythm of movement 14. Support 50 meters waterproof, running seconds timing, 12/24 hours free switching