Come and see our amazing products. The deluxe fingertip pulse oximeter shows your measured SpO2 and Pulse Rate on a high quality OLED screen (with six multidirectional display choices) and come with one more critically acclaimed feature, Perfusion Index (PI), that will improve the reliability of the readings dramatically. The PI conveniently informs you of the strength of your pulse. If the PI value is less than 0.2%, this means that your hands are too cold or improperly positioned in the pulse oximeter. Simply warm your finger and reposition it so that it is right under the LED lights. Intended use for spot check of blood oxygen saturation level at home, in sport and recreational use, such as mountain climbing, high-altitude activities and running. 2*AAA batteries will be needed(Not included) Pls confirm further with us if any query about packing info, inventory status and time schedule.