Advanced Finger Pulse Oximeter OLED Display with Sleep Monitor

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Key Features:

  • Clear 4-Way Auto-Rotating OLED Display
  • Automatic Power Off
  • Low Battery Alarm
  • Displays Oxygen Saturation (SpO2), Heart Rate, Perfusion Index and Plethysmograph Waveform
  • Battery Operated (2x AAA batteries)
  • Includes Lanyard for easy transportation
Product Details

IMDK Finger Pulse Oximeter 

The IMDK Finger Pulse Oximeter uses the latest oxygen sensing technology to accurately determine the level of oxygen in the blood (SpO2). With a SpO2 measurement accuracy range of ±2%, this pulse oximeter is ideal for spot-checking your SpO2 levels so you can stay on top of your health.

The IMDK Pulse Oximeter securely fits a wide range of finger sizes and is suitable for children as well as adults. The device operates on low power consumption, requiring only 2x AAA batteries (not included) to run. It automatic powers off after 8 seconds of inactivity to preserve battery life.

Perfusion Index
Perfusion index (PI) measures the amount of pulsatile blood flow to the skin. It is usually expressed as a percentage, ranging from 0.02% for very weak pulse to 20% for extremely strong pulse. Higher PI values indicate strong blood flow, while lower PI values may suggest weak perfusion or poor circulation at the monitored site.


  • Measurable Range Of Oxygen Saturation (SpO2): 70%-99%
  • Measurable Range Of Pulse Rate: 30-240 BPM
  • Accuracy Range for Oxygen Saturation (SpO2): ±2% (70%-99%), unspecified (<70%)
  • Accuracy Range for Pulse Rate: ±1 BPM or ±1%
  • Accuracy Range for Blood Perfusion Index: ≥0.2%, ±0.1%
  • Operation Temperature: 5?-40?
Related Parts
Technical Data
1.76 oz (50g)
2.36 * 1.37 * 1.18 inches (60*40*30mm)
2 AAA 1.5 V alkaline battery
Power Consumption
Item Includes
  • IMDK C101A2 Finger Pulse Oximeter 
  • User Manual
  • Lanyard

Note: Batteries not included

Reviews (10)
5 of 5 Stars!
Trisha M
(Verified Purchase)
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Subject: Finger Pulse Oximeter
When my Mom was released from hospital with a prescription for oxygen therapy we were all a little overwhelmed. We had to get a 5l stationary home oxygen concentrator and tubing before she could be released. All we had was a prescription but no experience with oxygen at all. Our fears were put to rest when we called Respshop. The respiratory therapist we spoke to was so kind and just full of information for us. We learned about the concentrator, the bubble bottle and the tubing. My Mom needed oxygen therapy for exertional activity. The tricky part was she really did not look like her oxygen levels were low when they were. Respshop encouraged us to get a Finger Pulse Oximeter to help us understand Mom's oxygen levels better. This was the best advice. Everything has been great for Mom at home with her own oxygen equipment. Mom will put the oximeter on her finger when she is at sitting still in her favourite chair and see her SP02 levels are over 90. Then when she stands up the drop to 87 right away. With this knowledge, she knows to put on her oxygen before she stands up. This keeps her oxygen levels at 90. Mom is super confident now because of the finger pulse oximeter. Thank you Respshop.
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1 of 5 Stars!
John F
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Worked fine the first few times I used it. Now the readings are all over the place. SpO2 as low as 80 and pulse rate as high as 300. If I turn it off and back on it occasionally gives correct numbers, but out of nowhere it can start giving screwy readings again. It's basically useless.

Hi, Thank you for your review! Please contact us so we can get this resolved for you. RESPSHOP 866-936-3754
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2 of 5 Stars!
Wanda F
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Received product in good condition, however was disappointed to find that just since I ordered it and now, Reshop now has it priced at %59.00.
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5 of 5 Stars!
Steve G
(Verified Purchase)
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Respshop website is easy to use with a wide selection of repertory device and accessories all at a good price. The Pulse Oximeter was shipped fast and arrived in a timely manner. The product works as described for SpO2 and BPM readings. Screen adjusts to multiple orientations at the push of a button making it easy to read no matter which finger or which hand the device is connected to.

This is a quality product providing rapid and accurate readings. I would highly recommend this device.
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3 of 5 Stars!
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Subject: Not a sleep monitoring oximeter!
I bought this because it states it can be used to monitor sleep O2 levels. The instructions specifically state to not use for more than 2 hours. I don’t see any way to retrieve the 2 hours of data. Not at all what is advertised. I would not have bought this as I already have 2 that are similar. Also the text is very small and hard to read.
**update** customer service reached out to me and refunded my purchase.
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4 of 5 Stars!
Keith O
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Bought this elsewhere (about same price of $59.00). Arrived on 5/4. Product itself seems fine. Is it medically accurate? (Meaning: Should a medical practitioner rely upon it for diagnosis? I'm not a doctor...but please don't! Is it fine for the average person to get a better understanding of how their body works? Yes.
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2 of 5 Stars!
Joseph S
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Bought elsewhere (Amazon, dumb me, paid $6.78 more.) Impossible to read data out-of-doors, even in shade (jogging, tennis, etc.) Even in-doors, display is far too dim - for out-of-doors activity (except maybe at night) product is useless.
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2 of 5 Stars!
Joachim F
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The display is VERY dim. Can't use it outside in daytime.

Thank you for your feedback.
I am sorry about this, please contact us so we can get this taken care of for you!
Your Respshop Team!
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4 of 5 Stars!
Kirsty D
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Functions as described. Accuracy is questionable- often get great variations in pulse/ bpm and Blood oxygen readings taken just minutes apart. Expensive so I expected better accuracy.
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3 of 5 Stars!
Leticia W
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I bought this oximeter because it states that it does sleep monitoring. However, this is wrong. On the instructions, it plainly states not to use it for more than 2 hours at a time.
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Showing 1 to 10 (of 10 reviews)
Q&As (2)
Have a question on this item? Ask here and we will answer it in 12-24 hours, usually in a few business hours! Questions and answers will appear here after we answer. You may also have email notifications.
I am knew to oxygen therapy. My doctor told me I need to learn when my oxygen saturation levels drop. Will this finger pulse oximeter help with that?

Yes, when you place the oximeter on your finger, you will see that information. You will see your oxygenation levels alter as you change positions from sitting to standing, with or without oxygen.

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How is this thing supposed to stay on your finger while you're sleeping?

Hello, there is a little grip when you're wearing it so it should stay on in the night. You may be able to find a sleeve for it or use a little bit of masking tape to help secure it, but you don't want the tape to be too tight on the finger.

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Showing 1 to 2 (of 2 questions)