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: SPO2 Measurement Range: 70-99%; SPO2 Measurement Accuracy: 2%; SPO2 Measurement Resolution: 1%; Pulse Measurement Range: 35-250BPM; Pulse Measurement Accuracy: 1BPM; Using Temperature: 5-40C; Display: Digital Tube; Power: 2*AAA (not included); Power Waste: 35mA; Measuring Stable Time: 20s; Weight: 0.34 kg;