Great product!
It works on cold fingers!!

Easy to use with clear and accurate readings
This Pulse Oximeter does quad duty with blood oxygen level, heart rate, respiration rate, and heart intensity. The device is rechargeable and easily clips onto a finger. In actual use I often found I had to switch fingers for the sensors to pick up any activity.I had cause to use this at a medical facility and was able to compare it to the device they were using. The medical device required multiple retries to get readings. This device just took two attempts.In addition to the standard value checking (the ad clearly states “not for medical use”, this is also a convenient device to put in a gym bag and use to check pulse and/or oxygen levels.Overall a good value

Works
I picked up this pulse oximeter because I wanted to keep tabs on my heart rate—you know, for those days when I drink enough coffee to power a small village—and also to check my oxygen levels because asthma likes to keep life interesting. For something meant “for sports and aviation only,” it does a pretty solid job of letting me know whether I’m doing okay or if I should maybe sit down and rethink my caffeine choices.The readings seem accurate and pop up fast, which I appreciate because the last thing I need is a suspenseful loading screen for my own vital signs. Slip it on your finger and boom—oxygen, heart rate, and a graph that makes you feel like you’re in a sci-fi medical bay. It fits comfortably, even on bigger fingers, and it’s lightweight enough that you could toss it into a bag without noticing unless you’re the kind of person who weighs things down to the gram.The only downside—and this is a big pet peeve—is that the second you take it off your finger, the screen immediately shuts off like it’s trying to hide evidence. No lingering display, no “here’s your last reading,” nothing. Just poof, gone. So if your eyesight isn’t amazing, or if you’re trying to tilt it into the light to see better, too bad. Blink and the numbers vanish like it never happened. I’ve used others that give you a few seconds of grace before going dark, and I miss that dearly.Other than that, it’s a handy little gadget. Great for runners, hikers, over-caffeinated humans, and anyone who has ever thought, “Is this normal?” Easy to use, easy to carry, and reassuring to have around—just don’t expect it to hold your readings like a polite guest. It also comes with a nice little storage box.Solid 4 stars for accuracy and convenience, minus one star for acting like a magician every time I remove my finger.

Great for peace of mind!
This little pulse oximeter brings me great peace of mind! I have SVT and it’s nice to be able to see exactly what’s going on with my body when I’m having an episode. It’s super easy to use, no on and off buttons, just clip it around your finger and it automatically turns on and starts finding your stats. The size is typical to any other handheld oximeter, great for throwing into your bag if you need to take it with you. The screen is easy to read and bright, you can also rotate the display making it easy to read your own stats or someone else’s.I did my own small tests to see if it was giving accurate results to the best of my ability. It counted the same bpm as I counted on myself and while I didn’t have a super accurate way to test the O2, I compared it to my daughters owlet sock and they reading were all within the same range.For the price I think it’s a great deal and the peace of mind it gives me is priceless!