The FDA approved PC-60C is used in hospitals, home healthcare, community medical centers, and more. Monitors pulse oxygen saturation and pulse rate. U.S. Doctor Recommended. Product Features: FDA & CE Approved High-quality color OLED display Compact, easy to carry, lightweight Measures perfusion index Auto shut-off after 8 seconds of disuse Low voltage/battery indicator Audio and visual alarms 1 year limited warranty SpO2: Range: 70%-99% Accuracy: 70%-99% ±3% Resolution: ±1% Alarm Low Limit: 90% Pulse Rate: Range: 30-240bpm Accuracy: ±2bpm or ±2% (whichever is greater) Resolution: ±1bpm Alarm Limits: 50bpm (low limit) 120bpm (high limit) Perfusion Index: Range: 0%-20% Power: 2 AAA alkaline batteries (included) Battery life: 30 continuous working hours Dimensions and Weight: 2.6in (L) x 1.4in (W) x 1.3in (H) 2.1oz (60g) (includes two AAA batteries) Accessories include: Lanyard, Cloth Carrying pouch, 2 AAA batteries, User Manual, Quality Certificate