Description: Detector simple and convenient to operate just with one button. Using advanced sensor, to collect data accurately and quickly, and monitor the blood oxygen status of human body. Large LED display, easy to read, even for the elder. Soft and comfortable, will not oppress the tip of the finger. Blood oxygen alarm function Widely used in families, oxygen bars, sports (used before and after exercise, not recommended during exercise), other areas, and etc. Specification: Display mode: OLED/LCD display (alarm function) SpO2 Measurement range: 0%~100% Pulse Measurement range: 25bpm~250bpm Powered by 2x AAA battery. (Not Included) Working current: ≤30mA Measurement accuracy: The blood oxygen saturation is ±2% in the 70%~99% segment, less than 70% is undefined, the pulse rate is 25bpm~250bpm, the measurement error is ±1% or ±1bpm, whichever is greater. When there is no finger inserted, it will automatically exit after 8 seconds. Material: ABS Size: 57.2×31.5×32.5mm Package Includes: 1 Piece Pulse Oximeter Note: 1.Please allow 1~3 cm error due to manual measurement, thanks. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand, thank you！