B7 Bluetooth Earphone Smart Bracelet, Support Sleep Monitoring Blood Oxygen Monitoring Heart Rate Monitoring 1. 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 you don't miss important calls 11. New large LED touch screen, high-definition display 12. A variety of personalized dials to enrich your choices 13. Raise your hand and turn your wrist to turn on the screen immediately, smart and convenient 14. Accurately record various sports data, exercise steps, etc. 15. New heart rate detection, touch to the heart rate interface 16. Automatic sleep monitoring at night, clearly understand the time of deep sleep and light sleep 17. Magnetic suction + buckle design, easy to take and double anti-lost 18. Support single-touch, Type-C charging, caller name display, Bluetooth headset to pick up the headset to answer, put down the headset to hang up, a variety of dials, sports information sleep monitoring, heart rate, blood pressure, blood oxygen, stopwatch, alarm clock, and more Various sports modes, raise your hand to brighten the screen and other functions.