Specification:Item Type: Health Tracker Smart RingMaterial: Aluminum alloy, ceramic, electronic componentsBattery Type: Lithium battery (shipped with built in battery)Battery Quantity: 18mAhDuration: 3 to 5 daysCharging Time: 45 minutesProtection Grade: IPX8How to Use:Turn on: After the ring is fully charged, disconnect the power and turn on automatically, blue lights flashes, waiting for Bluetooth pairingShutdown: When the ring is low, the red lights flashes, please charge the ring, fully charged and disconnected from the power supply, automatically connect the phoneBluetooth pairing: Open the APP, search for the Bluetooth device in My Device, and connect to the matching health data detectionHeart rate and blood oxygen detection: Remain seated, the measurement time is about 15 secondsTemperature check: Wear the ring correctly, the measurement time is about 5 secondsStep counting statistics: Turn on the step counting switch to enable the step counting functionPackage List:1 x Health Tracker Smart Ring1 x Charging Cable1 x Specification