







From the brand


Power Your Health
We are dedicated to developing products with high-precision but consumer friendly, finding an easier and more modern way to track your wellness, we believe you can get peace of mind to live a healthier and longer life.
Ring pulse oximeter
Pulse Oximeter &BP Monitor
Product Dimensions : 1.3 x 1.42 x 2.28 inches; 3.21 ounces
Item model number : FS20F
Batteries : 2 AAA batteries required. (included)
Date First Available : January 10, 2021
Manufacturer : Wellue
ASIN : B0881PTQH4
Best Sellers Rank: #139,968 in Health & Household (See Top 100 in Health & Household) #118 in Athletic & Aviation Pulse Oximeters
Customer Reviews: 4.5 4.5 out of 5 stars (7,502) var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
ACCURATE AND RELIABLE – Accurately measures your blood 02 level, pulse rate, pulse strength and pulse waveform and display them conveniently on a large OLED screen.
WARNINGS FOR UNUSUAL READINGS – The value on screen will flash when unusual 02 level or pulse rate is observed. Keep an eye on your 02 level and PR.
FREE APP FOR ANDROID AND iOS – Use App at no additional cost. Record and store a reading up to 10 hours continuously. (ONLY record when APP is running) View real time data, graphic report and trends of blood 02 level and pulse rate.
EASY TO USE – Take a reading in an easy-to-use way, simply clip it on to your finger and turn it on at the press of a button. Finger probe with SMART Spring System accomodates wide range of finger sizes.
COME WITH ACCESSORIES – Include 2 X AAA BATTERIES and a LANYARD for convenience. NOTE: This device is for Sports and Aviation use only and not intended for medical use.
5 reviews for Wellue Pulse Oximeter Fingertip Blood Oxygen Saturation Heart Rate Monitor with Batteries and Lanyard Bluetooth FS20F White
Add a review
$29.74

Amazon Customer –
Easy, Versatile and Reasonable
This Wellue Pulse Oximeter is a great product. It comes with two easy to install AAA batteries and a handy lanyard. It’s easy to use. I really like how you can sync it with your phone to keep an accurate record. The only challenging part of the entire product is attaching the handy lanyard to the Oximeter. All in all it is a great product with a great price. I would definitely recommend this.
Amazon Customer –
Best oximeter
This is the best oximeter I have ever bought. Having severe COPD I’ve been trying to find a good oximeter. Finally did with this one. It reads your oxygen level quickly. The app is simple to use.
JJ –
Also Works on My TOE… For Hands Free Monitoring over time
This little Bluetooth device (plus the ViHealth APP from iTunes or Google Play)tracks Oxygen Saturation and Pulse Rate over time. Its readings pretty well match what I see at Doc Office, and it’s AMAZING it can do it for under $20, when similar devices go for more than $150!!!Out of necessity and invention, I discovered today that it works just fine on a TOE, too!I was talking to my doc on a call and she was saying SPO2 needs to ideally be in the mid-90’s or higher, and I reminded her mine is historically quite a bit lower… down in upper 80s to low-to-mid 90s tops.She asked what it looks like while I’m sleeping and of course who knows? I don’t check it like that.But I supposed I could, if I used my Bluetooth monitor and wore a GLOVE or something to keep it on.Then I thought. let’s verify what is RIGHT NOW over time. But having to hold the device on my FINGER while I sit here and try to type… I can’t get much done. I kind of need my HANDS!But I said to myself, “Self, I said, you have a few other monitoring appendages available not doing much while you type. Wonder if this thang will work on the TOES!?”And sure enough… same reading; same numbers, fits fine…Great! So now I can get a much longer-time-scope reading SPo2 from my FOOT while I keep working.Perfect!
Samuel –
Good value, solid device, extras may cost more
The oximeter is probably the equivalent of similar devices at 2X the price. Upon going to the Wellue website I found only more expensive measurement and diagnostic tools ($50 to $250) and not this entry-level product (FS20F), which is probably what sellers refer to as a “loss leader.” Although the FS20F synched up through Bluetooth, it appears that any coherent tracking of a user’s history requires subscription to Welllue’s tracking and cloud services. I think I’ll remember my O and P levels with my own occasional, unrecorded readings of the device.As for the device, it seems accurate and is easy enough to use. Just several clarifications: 1. You will need to put the oximeter on a finger of the right hand and not the left, unless you plan to read the screen upside-down. 2. You need to press the button to “activate” the device for finger insertion. However, you do not need to re-press the button upon removing your finger as the device will de-activate automatically. 3. Upon de-activation, the power remains on and the batteries will eventually discharge. To preserve battery life (2 AAA’s) simply remove them (the instructions suggest after 30 days). 4. Be patient with inserting the lanyard. (I had success after wetting and winding the loop, which I then inserted in the hole facing me before pulling it out from the hole on top.)Finally, don’t panic if your reading of the oximeter is closer to 90 than to the recommended 95-100. The guidelines for reading the number, I’m convinced, are overly insistent re the top number; overly alarmist re the bottom.
Jay –
At first I had my doubts…but
At first, I had my doubts about the accuracy of this device however, that all changed with my last doctors visit. It is dead accurate. Perfectly matching with what they had with their pulse oximeter. It is easy to use and the phone app is very easy to understand and best of all…free… Yes the app does have a premium feature on it with some more stuff but the free portion of it is outstanding. If you need to keep track of your pulse rates and your oxygen levels throughout the week, month or year. I highly recommend this product.