B7 Bluetooth Earphone Smart Bracelet, Support Sleep Monitoring / Blood Oxygen Monitoring / Heart Rate Monitoring(Silver + Black Leather Belt) woman denim jeans dark brown brown leather buckle

dark brown brown leather buckle

before and after the two cameras

55 liters orange (55-65 liters can be expanded)

10 card slots

Mode of operation: mechanical

B7 Bluetooth Earphone Smart Bracelet, Support Sleep Monitoring / Blood Oxygen Monitoring / Heart Rate Monitoring(Silver + Black Leather Belt) woman denim jeans dark brown brown leather buckle1. Bluetooth version: 5. 0 2. Talk time: about 6 8 hours 3. Standby time: about 3 4 days 4. Battery capacity: Built in 90mAh 5. Charging method: Type C input 6. Charging time: about 1 2 hours 7. Waterproof level: life waterproof 8. Hidden earphone design, pick up to answer and put in to hang up 9. Blood pressure and oxygen monitoring anytime, anywhere, to accurately grasp your health status 10. The caller's name and number are clear at a glance, so