Roscoe Otc Fingertip Pulse Oximeter Includes Lanyard * The Roscoe Otc Fingertip Pulse Oximeter Allows You To Monitor And Maintain Pulse And Oxygen Saturation Levels On-the-go * Accurate And Fast Oxygen Level And Heart Rate Measuring Technology Is Ideal For Sports Enthusiasts During Strenuous Activities Or Mountain Climbing * Recommended For Spot-check Monitoring Only* No Prescription Required * Approved For Over-the-counter Retail Sale Large Easy-to-read Display * Soft Silicone Padding For A Comfortable Fit * One-button Operation * Up To 30 Hours Of Use With Batteries * Auto-off Function * Low-battery Indicator * Manual Lanyard And Two Aaa Alkaline Batteries Included * Attractive Retail Packaging * One-year Limited Warranty Dimensions: 2.25 L X 1.25 W X 1.25 H Weight: 0.1 Lb (including Batteries) Display Type Led Display Range: 0 - 99% Measurement Range: 0 - 100% Resolution: +/-2% For Spo2 Operating Temperature: 41-105f (5~40c) Storage Temperature: -4 -131f (-20~55c) Ambient Humidity: -15%-80% In Operation; < Or = 93% In Storage