Wireless Bluetooth 5.0 Earphones Heart Rate Monitor Sport Watch

Model Number:T89 TWSResistance:32Ω  Precautions1. It is forbidden to use the adapter with charging voltage >5v and charging current >2A, charging time is 60 minutes;2. It is forbidden to charge in case of water stains;3. It is forbidden to soak, swim, dive, diving, hot shower;4. This product is an electronic monitoring product, not for medical reference, the data is for reference only;5. Blood pressure test method: Please keep your body relaxed and still when testing, and make sure the wristband is at the same height as the heart. Please do not speak when testing;6. Wearing the ear during strenuous exercise may cause the product to be damaged or lost during exercise. common problemQ: How to deal with the upgrade failure?A: If the initial upgrade fails, please reconnect the "AMK" device to the APP, and the system will automatically remind you to upgrade.Q: Why is the heart rate (sleep) test not allowed?A: The first hand ring device monitors human activities through electronic sens