Non-invasive spot-check measurement of functional blood oxygen saturation and pulse rateAdjustable brightness OLED displays SpO2 (Oxygen Saturation), Pulse Rate, Pulse bar and Plethysmogram in easy-to-read font and formatFeatures 6 display modes with options allows user to toggle view in all 4 directions and options to show plethysmogram or pulse barMeasures SpO2 (Oxygen Saturation) levels ranging from 70% - 99%; with an accuracy of ± 3%Measures pulse rates between 30 BPM - 235 BPM with an accuracy of ± 2%Adjustable OLED display allows 10 levels of brightness to accommodate user preference and visibilityDesigned for low power consumption and automatically powers off when not in use to allow for greater use time and extended battery lifeRuns on 2 AAA 1.5V batteries (included) with "battery-low" indication to notify user to change batteriesRequires no routine calibration or maintenance other than replacement of batteriesCompact, lightweight and portable design weighs only 50 gIncludes neck lanyard for portability and convenienceProduct dimensions: 56 mm (L) x 32 mm (W) x 34 mm (H)Universal design suitable for pediatric to adult useNot Made with Natural Rubber Latex