Brand Name: COLMI Model Number: COLMI R02 Certification: ce Certification: FCC High-concerned chemical: None Activities Tracked: Activity Tracker, Steps Tracker Distance Tracker, Calorie Tracker Waterproof Grade: 5ATM Case Material: Steel Item Weight: 4.4g Battery Capacity(mAh): 17mAh NFC Support: No Origin: Mainland China Metrics measured: Heart Rate Monitor, Sleep Monitor Blood Oxygen Monitor, Stress Monitor Display screen: No Choice: yes