Features: 1.Lightweight: for carrying and Easy-To-Use outdoor. 2.Real-time spot-checks: Datas storing and data analysis function. 3.OLED display: simultaneous display for testing value and plethysmogram. Description: 1.Finger Pulse Oximeter is an economical and accurate way to detect pulse rate and oxygen saturation through your fingers. It is suitable for testing blood oxygen saturation and pulse rate in hospitals, homes, schools and medical centers. Specifications: Color:blue Display Type:OLED display SpO2 Measurement range:70%~99% Accuracy: ±2% on the stage of 80%~100%; ±3% on the stage of 70%~80%; Below 70% no requirement Resolution:±1% PR:Measurement range:25BPM~250BPM Accuracy:±1BPM or ±1%(the larger one) PI index:measurement scope:0~20 (optional) Power: 2 AAA1.5alkaline battery Power consumption:below 30mA Automatic power-off:the product shuts off by itself when no finger is in the product >=8 seconds Operation Environment:Operation Temperature:5C~40C Storage Temperature:-20C~55C Ambient Humidity:15%~85% non-condensing Device dimensions:64mm*38.8*35.5 Notes: 1. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures. 2. Please allow slight dimension difference due to different manual measurement.