The Quest Sport Pulse Oximeter with Perfusion Index Indicator And True Color OLED Display provides on-spot SpO2 (percentage of oxygen saturation in the blood) and pulse rate with accuracy and ease. Small and compact, it provides complete oximetry solutions while still able to fit in your pocket. The Sport Pulse Oximeter is widely used by all ages in sports, athletics, during aviation and for health management in home diagnostic monitoring. In addition, the Sport Pulse Oximete features the latest Organic Light Emitting Device (OLED) color display and Plethysmograph capabilities. High-quality OLED multi-color display; lightweight, compact and easy to carry Accurately measures SPO2, Pulse Rate and Perfusion Index Audio and visual alarm functions; Plethysmograph capabilities Package includes: Oximeter, carrying pouch, lanyard, instruction manual, two (2) AAA Batteries Intended use: Accurately measures SPO2, Pulse Rate and Perfusion Index Power source: Two (2) AAA batteries (included) Materials: ABS Plastic Dimensions: 1.77 inches high x 2.95 inches wide x 4.53 inches long