This Pulse Oximeter by Drive Medical blocks out extraneous light because you insert your finger into sheath instead of the finger clip style. This makes the oximeter more reliable. It has reflectant technology which removes motion artifact and is 100% nail polish resistant because the light the oximeter uses shines through the pulp of the finger.
Features and Benefits:
A spot check monitor for blood oxygen saturation and heart rate using reflectance pulse oximetry (RPO)
Long-lasting battery – over 1,000 hours
Highly resistant to many forms of motion
Completely nail polish tolerant, no matter how dark the color