This oximeter uses a high-performance chip, the calculation results are fast and precise. Features one-click measurement, high-definition LED screen and non-slip design.   Features: Fingertip pulse oximeter for simple daily checking, can be used in families, school, social care institutions, community center, etc.  Intended for measuring blood oxygen saturation and pulse rate of adults or children, and you can use it for measurement before or after sports.  Equipped with clear OLED screen showing SpO2 value, pulse rate (PR), pulse wave, etc.  Easy to use, open the probe, then insert one finger into the probe, turn on the oximeter, after about several seconds, the measurement result can be read directly from the screen.  Powered by 2pcs AAA batteries(not included), the pulse oximeter will automatically power off in 8s if there is no finger signal.  Compact size and lightweight, with lanyard, convenient to carry around and use anytime anywhere.   Specifications: Color: White & Blue;  Display Type: OLED display;  SpO2 Measuring range: 0%-100%;  SpO2 Declared Accuracy: 70%-100% : ±2%, below 70%, unspecified;  PR Measuring range: 30-250bpm, ±1bpm;  PR Declared Accuracy: ±2bpm or ±2% select larger;  Power Supply: 2 * AAA batteries(not included);  Operation Temperature: 5℃-40℃;  Operation Humidity: 15%-80%;  Atmospheric Pressure: 70kPa-106kPa;  Item Size: 6 * 3.2 * 3.2cm/ 2.4 * 1.3 * 1.3in;  Item Weight: 25g/ 0.88oz;  Package Size: 7 * 7 * 4cm/ 2.8 * 2.8 * 1.6in;  Package Weight: 41g/ 1.4oz;   Packing List: 1 * Oximeter;  1 * User ManualManual