The pulse oximeter can be used to measure human hemoglobin saturation and pulse rate through finger, and indicate the pulse intensity by the bar-display. It is suitable for use in family, office and oxygen bar etc. Features: Operation of the product is simple and convenient. The product is small in volume, light in weight, and convenient in carrying. Power consumption of the product is low and the AAA batteries can be operated continuously for 20hrs. The product will automatically be powered off when no signals is in the product within 5s. The pulse oximeter features in small volume, low power consummption , convenient operation and being portable. Suitable for use in family, office, oxygen bar or any other publics. Specifications: Material: Silicone Power: 2 x AAA batteries (not included) SPO2 Measurement Range: 70-99% SPO2 Measurement Accuracy: +-2% SPO2 Measurement Resolution: +-1% Pulse Measurement Range: 35-250BPM Pulse Measurement Accuracy: +-1BPM Using Temperature: 5-40°C