Specifications: Color: blue Size: 6*3*3.5cm Material: plastic Display mode: OLED display Accuracy: 70%-99%±2% Working voltage: 2.6 - 3.6V Power consumption: not more than 25maA SpO2 measurement range: 0 -100% Pulse rate measurement range: 30 - 250BPM Resolution: 1BPM Package Included: 1 * Oximeter.