Frequently Asked Questions

What is a Pulse Oximeter?

Pulse oximeters measure light absorption in the finger to noninvasively monitor oxygen saturation and pulse rate. Fingertip pulse oximeters are being increasingly used for general wellness and health applications including sports, fitness, and relaxation management. Developed by Masimo, the leading brand of hospital pulse oximeters¹, the MightySat® fingertip pulse oximeter provides accurate blood oxygen saturation and pulse rate measurements when other pulse oximeters fail.

Why should I buy MightySat® over other Fingertip Pulse Oximeters?

Multiple companies have introduced low-priced, battery-powered “fingertip” pulse oximeters to the consumer market. In some circumstances, these products may provide inaccurate measurements or no measurements at all. This often occurs when there is low blood flow to the finger (such as when the fingers are cold) or during hand movement (even with minimal motion such as shaking). In addition, many of the products on the market are of low quality and do not interface with smartphones to store, manage, and share data.

What technology is behind the MightySat® and iSpO2®?

Masimo Corporation originally developed Signal Extraction™ pulse oximetry for clinical use but now it is available for general wellness and health applications including sports, fitness, and relaxation management. Masimo Signal Extraction Technology open paren (SET®)close paren uses five parallel signal processing engines that measure through challenging conditions, including movement and low blood flow.

How can I use the information MightySat® and iSpO2® provide me?

MightySat® and iSpO2® provide data that athletes can monitor for better training, increasing or decreasing intensity, and monitor recovery to improve athletic performance.

Is there a pediatric probe attachment for this product?

No. The MightySat® is intended for spot-checking on people above the weight 30kg/ 66lbs.

Does the Masimo Personal Health App sync with Apple Health?

Yes, it does. You have to authorize it in the settings for both Apps.

How do I connect my MightySat® and iSpO2® MightySat® device to my smartphone?

Parameter data can be displayed on a compatible smart device with Bluetooth® LE models. Bluetooth® LE is an optional feature available on specific versions of MightySat® for use with compatible smart devices. For a full list of compatible smart devices, see . The free Masimo Personal Health App is downloadable from the Apple App Store for iOS devices or Google Play™ store for select Android devices. Please note that a MightySat® is required for the App to work.

Does MightySat® work with iOS 9, 10, 11, 12, and 13?

Yes, the MightySat® does work with iOS 9, 10, 11, 12, and 13.

Does it work with iPhone 6?

If your iPhone has Bluetooth® capability and you purchase a MightySat® with Bluetooth®, then, yes, it will work with the iPhone 6.

Does MightySat® work on Android Phones?

Yes, MightySat® Models 9800 and 9900 are compatible with Android Jelly Bean, KitKat, Lollipop, and Marshmallow.

How can I get product support for my device?

Please contact Masimo Technical Services with any questions or assistance you may need regarding your Masimo Fingertip Pulse Oximeter. For customers in the USA, support is available at or (800) 326-4890. For customers traveling outside the USA with their Masimo Fingertip Pulse Oximeter, local contact information can be found at


Reference 1 iData Research. U.S. Market for Patient Monitoring Equipment. 2014.

* It is suggested to measure PVi in the same body position, remaining still and without talking, at the same breathing rate and depth of breathing, until you see a high confidence PVi value (displayed value is bright, not dim). An increase in PVi may indicate a decreased level of hydration, increased breathing effort, or other factors. A decrease in PVi may indicate an increased level of hydration, decreased breathing effort, or other factors. Multiple factors other than hydration and breathing effort can affect PVi, including breathing rate, depth of breathing, body position, body movement, vascular tone, blood flow to the finger (perfusion index), normal variation within a short-term monitoring session, waveform shape changes, and/or cardiovascular abnormalities.

Reference 1 Schooljans A et al. Acta Anaesth Belg. 2010 (61), 147-150.
Reference 2 Mathews D et al. ASA 2014. A1124.
Reference 3 Perel A. Anesth Analg. 2014 Dec;119(6):1288-92.

Close (esc)


Use this popup to embed a mailing list sign up form. Alternatively use it as a simple call to action with a link to a product or a page.

Sign up for our newsletter

Age verification

By clicking enter you are verifying that you are old enough to consume alcohol.

Shopping Cart

Your cart is currently empty.
Shop now