B7 Bluetooth Earphone Smart Bracelet, Support Sleep Monitoring / Blood Oxygen Monitoring / Heart Rate Monitoring(Silver + Black Leather Belt) woman denim jeans 55 liters orange (55-65 liters

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

Wallet Fold: 20% off

before and after the two cameras

Mode of operation: mechanical

Battery capacity: 4400MA

B7 Bluetooth Earphone Smart Bracelet, Support Sleep Monitoring / Blood Oxygen Monitoring / Heart Rate Monitoring(Silver + Black Leather Belt) woman denim jeans 55 liters orange (55-65 liters1. 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