The John Bunn DigiO2 Finger Pulse Oximeter provides fast, reliable and accurate oxygen saturation (SpO2), pulse rate measurements. Ideal for Home use. Includes: 1 DigiO2 Finger Pulse Oximeter, lanyard, (2) AAA alkaline batteries, User Manual. Its lightweight and compact design makes it an ideal solution for home, clinical and EMS settings. FEATURES Lightweight, pocket-size solution; Provides fast and accurate SpO2 and pulse rate measurements; Multiple-directional display for easy read; Large LED color display that is easy to read; Adjustable 10 settings for brightness level; Simple one button operation; Automatic power off function to conserve batteries; Accommodates widest range of finger sizes from pediatric to adult; 1 year warranty. Display: Oxygen saturation (SpO2), Pulse rate and Plethysmogram; Multi-directional display so readings can be viewed from any angle; Display Range: SpO2: 0% to 100%, Pulse Rate: 30 to 235 bpm, Accuracy (% SpO2): 70% - 100% +/- 3%, Pulse Rate Accuracy: 30-99bpm, 2bpm, 100-235bpm, +/- 2%; Alarms: Low Battery indicator.