Product information: Blood oxygen level range: 70% - 99% Pulse rate accuracy: ± 2BPM OR ± 2% Pulse rate range: 30~250BPM Ring number: 50-82MM Weight: 15G Equipment size: 38MM * 30MM * 38MM Wireless: Bluetooth 4.0BLE measurement Interval: 1S Vibration source: low oxygen level, high/low pulse rate Recording parameters: blood oxygen level, pulse rate, body movement Display interval of APP data chart: 4S Built-in memory: 4 sections, up to 10 hours each time Battery life: rechargeable lithium polymer, 3.7VDC, 12-16 hours of use Compatible mobile phone systems: IOS 90 or higher, ANDROID 5.0 or higher. With Bluetooth 4.0BLB Packing list: Blood oxygen detector*1

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