Come and see our amazing products. This device allows for almost all size of fingers from children to adults due to the finger chamber design, it measures the level of oxygen in the blood and reads the pulse rate in just eight to ten seconds. It is crucial to use the device in a stationary position and not while in motion for precise readings. SpO2 and Pulse Rate are graphed on the bright LED display. It comes with 2 AAA batteries and lanyard for easy carry, the oximeter automatically powers off when not in use. Pls confirm with us about the packing info, stock color and exact production time before placing your order.