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. A-level backlight, large font, high resolution, suitable for the elderly. 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. Reliable & Fast: The pulse oximeter for the fingertip determines your oxygen saturation within 5 seconds.Specifications: Color: White & Blue Display Type: OLED display SpO2 Declared Accuracy: 70%-99%, ±2% on the stage of 80%-99%,±3% on the stage of 70%-79% PR Declared Accuracy: 30-240bpm, ±1bpm 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/ 1.4ozPacking List: 1 * Oximeter 1 * User Manual(English)