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1. Please check if you are using the USB data cable, not the Power cable. The correct USB data cable should have a bulky end that plugs into the PC and should be labeled with “USB”. The USB data cable is included with every PC-66H and PC-66L unit.

2. If you are using the correct USB data cable, but still getting COM error. Please search and run “Device Manager” in the Windows Search. Check if you have Prolific USB-to-Serial Comm Port under Ports, as shown below. If not please download and run this USB Driver, choose Repair if prompt, and check Device Manager when finished installation

If you have the Prolific USB-to-Serial Comm Port show up, please make sure you have the device ON with the data upload screen at all time when you perform data upload in the software. You will need to finish all uploading process, including data selection and uploading to the patient record, while the device data upload screen is ON.

Orders placed Monday - Thursday will be processed and shipped from our warehouse the next business day.

Orders placed on Friday - Sunday will be processed and shipped on Monday.

You will receive a tracking number by email once your order is shipped. 

*Shipping and delivery time may be subject to change during holidays.
Please refer to our Holiday Shipping Suggestions for details or follow us on social media for any shipping and delivery time updates.

Currently, the CMI Health Store only accepts orders from the United States. For international order, please contact for assistance.

CMI Health Offers 3 different shipping options.

- 3-5 Day Standard

- 2 Days
- 1 Day

Please Note: Shipping to Alaska, Hawaii and other US territories may require extra time.

Yes. Our site is SSL certified and hosted by Shopify. Credit card transactions are secure and processed using Shopify payment or other third party payment gateways. We at CMI Health are committed to providing a safe and secure online shopping experience for our customers. For more detail, please see our Privacy Policy here.

CMI Health Store facilitates ordering with Debit/Credit Cards (such as Visa, MasterCard, Discover and American Express), Paypal, Shop Pay, Apple Pay and Google Pay. We do not accept C.O.D. orders or electronic checks.

Both of our PC-66 Series Handheld Pulse Oximeters are equipped with the ability to sound an alarm if your reading drops below the threshold value. You can manually set your own values in the device to better suit your needs and lifestyle.

Yes, you can still operate your oximeter while it is plugged in and charging.

We suggest purchasing the PC-66L Rechargeable Handheld Pulse Oximeter for those who need to use their oximeter overnight.

Both the PC-66H and the PC-66L can technically be used for continuous overnight monitoring. However, using our rechargeable pulse oximeter tends to save users money in the long term as it eliminates the need to purchase or replace batteries.

Keep in mind, you can still use the oximeter while it is charging!

Muting the alarm will only block out the standard beeping. If your readings go below your set threshold values, the oximeter will still sound an alarm to alert you.

Pulse oximetry measures the percent of blood hemoglobin that is oxygen rich. It functions by passing a red beam of light into the fingertip. The oxygen level is then determined by measuring how much light passes through the fingertip vs how much is absorbed. 

For more information on how Pulse Oximetry and Sensors work, check out this blog.

We suggest using the Soft Rubber/Silicone sensors #84 for overnight use.

Our overnight sensor is designed to fit comfortably and securely on the user's finger during sleep. The stronger grip helps to prevent the sensor from moving or falling off during unconscious movement.  

While it is not necessary to do so, many parents have begun monitoring their infants overnight and during naps as a preventative measure against Sudden Infant Death Syndrome (SIDS). Low oxygen levels can be a key early indicator of major issues that are often involved in SIDS. Consult a pediatrician if there is concern. Click here to view our Infant Foot Sensor #72.

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