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twivnignt Wireless Fingertip Pulse Oximeter Blood Oxygen Saturation Monitor Home Health Features: 1. Automatically receive data from the oxygen monitor in real-time, and store the received data. View the stored data at any time. Only synchronize and store data while opening the APP. 2. Monitoring your HRV can help you reach peak productivity, manage stress, and fine-tune your training regimen. 3. Compact and portable: being so mini and light-weight, this product does not take much space and can be easily taken away. Description: Built-in wireless connection function, more convenient to use. Suitable for families, hospitals, oxygen rods, social medical enterprises. Specifications: Color: white Material: ABS Size: 6*4*5cm Application: Finger Support system: Android and for Apple Blood oxygen saturation accuracy rate: 70-99%PR Measuring range: 30-240BPM Display: IPS Version: V5.0 Package Included: 1 * Oximeter 1 * manual Notes: 1. Please allow 0-1 inch error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from real object.