LED Display Finger Pulse Oximeter by John Bunn Use this portable medical equipment to check oxygen saturation SpO2 , pulse rate and perfusion index or pulse strength measurements. The John Bunn DigiO2 oximeter is a digital finger pulse oximeter with a compact design. This medical supply is a pulse oximetry device ideal for EMS, hospital and clinical settings as well as for home use and aviation. John Bunn DigiO2 Oximeter Features Performance Lightweight, pocket-size solution Provides fast and accurate SpO2, pulse rate and pulse strength measurements. Large LED color display that allows for easy-to-see day or night use Simple one button operation Automatic power on/off function shuts off after 8 seconds of non operation to conserve batteries Display Oxygen saturation SpO2 , pulse rate and PI measurements. Bar graph display. Multi-directional display so readings can be viewed from any angle. Display Range SpO2 35% to 99% Pulse Rate 25 to 250 bpm Perfusion Index 0.2% 20%Accuracy % SpO2 5% 99% /- 2% 50% 75% /- 3% Pulse Rate Accuracy 25 to 250 bpm /-2bpm Perfusion Index 0.2% 2% /- 0.1%2% 10% /- 1% 10% 20% /- 2% Alarms Audible and visual alarms for Low Battery, Low SpO2, High Pulse Rate, Low Pulse RatePre-set Alarm Limits Low SpO2 90% Low Pulse Rate 50bpmHigh Pulse Rate 120bpm Resistance to surrounding light The difference between the values measured in the condition of indoor natural light and that of a darkroom is less than /- 1%. 1 Year Warranty Specifications Dimensions and Weights Size 2.59 x 1.42 x 1.3 66 mm x 36 mm x 33 mm Weight 60g including batteries Power Supply Requirement Two 2 1.5V AAA alkaline batteries included Environmental Requirements Operation Temperature 41 degreesF 104 degreesF 5 degreesC 40 degreesC Relative humidity 30% 80%Atmospheric pressure 10.15 psi 15.37 psi 70kPa 106kPa Storage Temperature 4 degreesF to 131 degreesF 20degrees C to 55degrees C Relative humidity This item ships from a separate warehouse and may require extra time for delivery.