Brand Name: COLMI Model Number: COLMI R02 Certification: ce High-concerned chemical: None Activity Tracked: Activity Tracker Activity Tracked: Steps Tracker Activity Tracked: Distance Tracker Activity Tracked: Calorie Tracker Waterproof Grade: 3ATM Case Material: Steel Item Weight: 4.7g Battery Capacity(mAh): 17mAh NFC Support: No Origin: Mainland China Metrics measured: Heart Rate Monitor Metrics measured: Sleep Monitor Metrics measured: Blood Oxygen Monitor Metrics measured: Stress Monitor Display screen: No Choice: yes