Come and see our amazing products. This oximeter features with one button measurement, finger clip design, displayed with large LCD screen, easy to read. Portable and pocket size, Provides spot readings of SpO2 and heart rate for the busy healthcare professional. Pulse rate value display, bar graph display, and pulse waveform display. Accuracy: SpO2 +/-2% / HR +/-1 BPM. Automatically power off in 8 seconds when there is no signal. Powered by 2 AAA batteries(Included). Widely used in home, hospital. Pls confirm further with us if any query about packing info, inventory status and time schedule.