Features: 1. High-definition four-color, OLED display, low battery indicator, 5-level brightness adjustable. The operation menu is convenient for function setting. 2. In addition to accurately and reliably measuring SpO2 values ​​and pulse 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 use it with confidence. 4. Compact and portable: being so mini and light-weight, this product does not take much space and can be easily taken away. 5. With blood oxygen, pulse, bar graph display, PI perfusion index monitoring and RR respiratory rate functions. Description: This product is specifically designed for climbers, skiers, cyclists or any sports enthusiast who is interested in measuring their blood oxygen saturation and pulse rate. Specifications: Color: black Size: 5.7* 3* 3cm Material: plastic Display mode: OLED display Accuracy: 70%~99%, ±2% Working voltage: 2.6~ 3.6V Power consumption: not more than 25maA SpO2 measurement range: 0 -100% Pulse rate measurement range: 30 - 250BPM Resolution: 1BPM Package Included: 1 * instruction manual 1 * oximeter 1 * lanyard 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.