Finger Oximeter with Pulse, Fingertip Pulse Oximeter with Respiration, Portable Blood Oxygen Saturation Monitor with Pulse, 1 * Spo2 Sensor, 1 * Lanyard and 2 * Batteries

Seems to work. You need a magnifying glass to read the instructions which are hard to follow

I have a friend that just order this pulse oximeter. It’s quick, easy to carry and doesn’t take long to get a read back .The spO2 and the heart rate were shown and given accurately. The design of the battery cover is unique. It also has a string to attach to the oximeter. Very helpful device!!!

For the most part, the readings on this pulse oximeter appear accurate. However, it's important to understand that readings are impacted by body temperature, as is indicated by the instructions that came with the oximeter. If the person's finger is too cold, there will be no reading. If this happens, I would suggest warming up the finger and trying again.

Accuracy

With the covid pandemic, I've been a bit paranoid about getting sick. And with an allergy scare recently, this is a perfect device I can carry with me, either on the lanyard or just in my pocket. It even came with AAAs. It has an easy to read oxygen concentration and heart rate, as well as your pulse as a 'strength' bar. (95-100% o2 concentration is healthy.) You simply press the button and wait only a few seconds. It appears to be high quality plastic and quite durable. No bluetooth or save feature though. But for this cost I dont expect it. Also makes it easy to practice biofeedback; controlling your heartrate for anxiety and etc.