Medical Wearable

Masimo W1® Medical

Introducing the first and only FDA-cleared medical wearable to provide continuous, real-time, oxygen saturation (SpO2) and pulse rate (PR).


Now with the Masimo W1 Medical Wearable you can:

  • Accurately track your health data with a medical grade sensor in an easy-to-interpret format.
  • Get notified when oxygen saturation and pulse rate are outside of their normal ranges.

Coming Soon in 2024!

Sign up to be the first to purchase when available

Buy Masimo W1® Sport today, and receive a $500 credit toward the purchase of Masimo Freedom™ watch at launch.

Who Is Masimo W1 Medical Wearable For?

heart illustration

Health Conscious

Those looking to improve their fitness and accurately track their physiological data.

Patient Under the Care of a Physician

Patients who may be prescribed use of the Masimo W1 as part of their care with their doctor.

Feature (Use)



Pulse Rate

Embrace the comfort of knowing when you or a loved one is at risk with low oxygen levels or pulse rate.

Lifestyle Friendly Wearable

Accurate Health Data

Notifications For Abnormal Physiological Parameters

Insights Into Your Personal Health

Act on Your Personal Data

Oxygen level (SpO2)

Oxygen level (SpO2)

Oxygen levels in your blood can change with heart and lung function, activity, and altitude

Heart Rate (HR)

The number of times the heart beats in a minute, based on electrical signals
Pulse Rate

Pulse Rate (PR)

How often the heart pushes blood through your body, which can change with general health, physical activity, and with your mental or emotional state (e.g., stress, anxiety)
Perfusion Index

Perfusion Index (Pi)

A calculation of the relative strength of your pulse, which changes based on your circulation

Electrocardiogram (ECG)

A simple and noninvasive measurement of your heart’s electrical activity. The average heart rate is typically 65-100 beats per minute

Offer Terms

This Promotional Offer of a $500 credit toward the purchase of a FreedomTM Watch (“Offer”) is only available to residents of the United States of America. Purchaser must be 18 years of age or older or the legal age of majority in the jurisdiction where you reside. The Offer cannot be combined with any other offer, promotion, discount, or program. The Offer will be applied to the full purchase price of the Freedom Watch, plus any applicable taxes. The Offer must be redeemed by December 31, 2024, or thirty (30) days following the date that the Freedom Watch become commercially available, whichever is later. Following redemption of this Offer, if the Freedom watch is returned for any reason during the return period, you will only receive the amount actually paid for the Product. This Offer is not redeemable for cash and has no other monetary value. This Offer cannot be applied to the purchase of any other product sold by Masimo. This Offer is non-transferable and non-assignable. If the W1® is returned for any reason during the return period, this Offer will be terminated and no longer valid. This Offer is limited to one (1) Offer per person. This Offer incorporates by reference the Terms of Sale for the purchase of the W1. 

      Download the Masimo W1 Whitepaper here.