DESCRIPTION SPECIFICATIONS Professional quality readings of oxygen saturation level and pulse rate monitoring Monitor and maintain pulse and oxygen levels for optimal health Perfect for sports enthusiasts, COPD patients, asthmatics, children and adults Large, easy-to-read LED display screen Displays SpO2 and Pulse Rate Low power indicator and Auto-Off function after 8 seconds Approximately 30 hours of normal operation Accommodates a wide range of finger sizes from pediatric to adult Powered by two (2) AAA alkaline batteries (included)