FDA Approved. Measures quickly and accurately pulse rate and SpO2 blood oxygen saturation of arterial hemoglobin levels. Bright LED display shows real time Pulse Rate, Pulse Rate Bar and SpO2 level.Long battery life of thousands of readings plus automatic power off. Light and compact. Accommodates wide range of finger sizes. Not a medical device. You Get: Fingertip Pulse Oximeter, Neck/Wrist Cord, Case, User Manual, 2-AAA Batteries.SantaMedical SM-150 Finger Pulse Oximeter is an affordable and accurate way to check pulse rates and blood oxygen saturation levels. Self-adjusting finger clamp plus simple one-button design allows for easy operation.