Specification: 【TYPE1】 Material: ABS Colour: Black size: Oximeter: 5.8*3.2*3 CM Oximeter bag: 10CM*7CM*4CM (Due to manual measurement, there will be an error of 1-3mm.) Display mode: OLED display Blood oxygen: 0%-100%±2% Pulse rate display: 0-250bpm±1bpm Working current: ≤50mA Operation mode: intermittent Instructions: 1.Remove the back cover and insert the AAA battery. (The product does not contain it) 2.Press the button on the front screen to power on the device. 3.Insert your finger into the device and make sure the nail is facing up 4.The blood oxygen saturation and pulse rate readings should be displayed after a few seconds. Note: Please bring 2 AAA batteries for 1 oximeter 【TYPE2】 Color: White Material: ABS Size: 58*30*32mm (length*width*height) (Due to manual measurement, there will be an error of 1-3cm.) Power supply: 2 x AAA 1.5 V batteries (not included) Power consumption: less than 30mA Resolution: 1 BPM Accuracy: 2 BPM Pulse intensity: bar graph indicator and volume graph Display: color screen display Life time: about 24 hours Power consumption: 30mA (normal) Battery status: indicator icons and notifications Automatic shutdown function: 10 seconds after no signal Measurement performance at low perfusion: 0.3% Feature: 【TYPE1】 1.The OLED display is clearly visible. 2.Small and light, simple one-button measurement. 3.Quickly and accurately detect blood oxygen and pulse rate. 4.The silicone finger mold is comfortable to wear. 5.Suitable for all ages, easy to carry, suitable for families and travel. 【TYPE2】 1.The high-precision pulse oximeter based on all-digital technology is designed for non-invasive point detection of functional blood oxygen saturation in arterial hemoglobin. 2.The advanced DSP algorithm can reduce the influence of motion artifacts and improve the measurement accuracy of low perfusion. 3.The oximeter can measure human hemoglobin saturation and heart rate with fingers. 4.This product is suitable for families and hospitals. Oxygen bar, social medical institutions, physical fitness, etc. 5.Light weight, easy to carry, easy to use, monitor your health anytime, anywhere. 6.When the battery power is too low, it will remind you and replace the power supply in time. 7.Intelligent system recognition and judgment: If there is no measurement response in about 8 seconds (finger does not enter the instrument), the oximeter will automatically shut down, which is highly energy-efficient. 8.Standard 2 x AAA 1.5V batteries can support continuous work for more than 24 hours (not including batteries). Package Including: 【TYPE1】 1*fingertip oximeter 1*User Manual OR 【TYPE2】 1*Oximeter (without battery) 1*lanyard 1*Instruction