Viverity OTC Fingertip Pulse Oximeter by Roscoe Medical.

Features:

Viverity Finger Pulse Oximeter allows you to monitor pulse and oxygen saturation levels for optimal health. Accurate, fast oxygen level and heart rate measuring technology. Ideal for sport enthusiasts!

Approved for over-the-counter sale. No prescription required.
Simple, one-button operation.
Bright digital LED one-way display.
Portable, non-invasive spot check of oxygen saturation and pulse rate.
Soft silicone padding inside secures finger and decreases artifact.
Uses two AAA batteries with up to 30 hours of use.
Low battery indicator.
Auto-off feature.
Comes in attractive retail clamshell package.
Drop tested durability.

Singles.