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Characteristics : 1. Four high-definition colors, OLED display, low battery indicator, 5-level adjustable brightness. The operation menu is convenient for setting the functions. 2. In addition to accurately and reliably measuring SpO2 values ​​and heart rate, the Deluxe version also has many other useful functions such as plethysmographs and alarms. 3. Safe material: The product is made of plastic material, which is safe and environmentally friendly, and children can confidently use it. 4. Compact and portable: Being so small and light, this product does not take up much space and can be easily removed. 5. With blood oxygen, pulse, bar graph display, PI Perfusion Index monitoring and RR respiratory rate functions. Description : Designed for climbers, skiers, cyclists, or any sports enthusiast interested in measuring their SpO2 and heart rate. Specifications : Color blue Size: 6 * 6 * 3 * 3.5cm Material: plastic Display mode: OLED screen Accuracy: 70% -99% ± 2% Operating voltage: 2.6-3.6V Power consumption: no more than 25maA SpO2 measuring range: 0 -100% Pulse measurement range: 30 - 250BPM Resolution: 1BPM Package Included: 1 * oximeter 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 actual item.