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Quick Start Guide

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User Manual


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Device Compatibility


Masimo tests and validates a variety of smartphones to ensure compatibility. If you do not see your smartphone currently listed below, check back soon, as we frequently add support for new devices. Please contact Masimo Customer Support with any questions.



  • Android 6.0 (Marshmallow) and up
  • Display Size 4.7” and up


  • iOS

Wi-Fi Connection 

The Home Medical Hub is only compatible with 2.4 GHz wireless networks.



Initial Setup

The Opioid Halo kit contains two (2) disposable Masimo Sensors*, one (1) Masimo Chip, (12) replacement tapes, one (1) Home Medical Hub, a User’s Guide, and Quick Start Instructions. The Masimo Halo App is required and available on the App Store for iOS devices and Google Play for Android devices.

*Additional replacement sensors are available for purchase

Search for “Masimo Halo” on the App Store or Google Play.

Halo App icon

Yes, a smartphone equipped with Bluetooth® is necessary to use Opioid Halo.

Opioid Halo is compatible with most Android and iOS devices.


  • Android 6.0 (Marshmallow) and up
  • Display Size 4.7” and up


  • iOS 12 and up

Yes, a Wi-Fi connection is necessary for the initial setup of the system and during monitoring. The Home Medical Hub must remain connected to Wi-Fi during monitoring for the system to work properly. The Home Medical Hub is only compatible with 2.4 GHz wireless networks. 

No, a user is not required to designate any Emergency Contacts to use Opioid Halo, but it is recommended.

No, an Emergency Contact does not need to download the app. Notifications are sent by SMS.

Yes, a text message invitation is sent to each Emergency Contact designated in the app. The Emergency Contact must accept the invitation by replying with the code provided in the invitation.

In the Emergency Contact section of the app, each Emergency Contact carries a status label indicating “Accepted,” “Pending,” or “Unsubscribed.”

A user can designate up to 10 Emergency Contacts.

Yes, each Emergency Contact receiving text notifications for a particular user will receive the same information.

Yes, a text notification is sent to the Emergency Contact indicating that they are no longer an Emergency Contact.

Get more information on Emergency Contacts.

Daily Monitoring and Usage

Each sensor’s battery should last for up to 96 hours of continuous use. A flashing orange light indicates the sensor battery is low. A flashing red light indicates the sensor battery needs to be replaced.

When the sensor is not in use, remove the reusable chip and place the yellow adhesive label back on the chip holder portion of the sensor.

The Home Medical Hub must be within standard Bluetooth range of your sensor to receive data. This distance can vary depending on the use environment. Maintaining a direct line of sight between the sensor and Home Medical Hub is recommended.

If the sensor is out of range of the Home Medical Hub, the user will receive a banner message in the app. The Sensor Light Indicator (on the chip) will change from blue to green when it is no longer Bluetooth-paired with the system.

Yes, the app can run in the background and continue to receive data collected from the sensor. Do not close/quit the app during a monitoring session.

You can wash your hands while wearing the sensor. However, avoid submerging it in water. Do not wear the sensor in the shower or bath. You should replace the adhesive tape when it is dirty or no longer sticking.

Disconnect the Masimo Chip by pushing down on the tab to release and separate it from the sensor. Do not throw away the chip. Read the instructions on how to change sensors and re-install your chip.

The Masimo Sensor and adhesive tapes can be disposed of as part of standard household waste collection. The Masimo Chip can be reused and should not be discarded.

The Masimo Chip includes a light to indicate sensor and pairing status. Refer to the table below for a description of what the colors indicate. This information can also be found in the app under Main Menu > Devices > Sensor.

Color Description Next Steps
  • Masimo Chip ready to pair
  • Follow app instructions for pairing.
  • Successful pairing of Masimo Chip
  • Verify data is displayed on the app.
  • Sensor battery issue
  • Remove yellow label and any obstruction to the white portion of the chip holder.
  • Disconnect the chip from the sensor, wait 30 seconds, and reinsert the chip into the sensor.
  • Low sensor battery
  • Consider replacing sensor. Do not discard the chip.
  • Battery depleted or sensor needs to be replaced
  • Replace sensor, but do not discard the Masimo chip. If issue persists, replace the chip.
  • Contact Masimo Customer Support, or replace both the sensor and the chip.

During active monitoring, the Home Medical Hub will alarm if it loses Wi-Fi connection.

Yes, if the phone has a data connection, the system will be able to send text notifications to the cloud and to Emergency Contacts.

Opioid Halo does not support monitoring multiple individuals simultaneously. A complete system consisting of a chip, a sensor, a Home Medical Hub, and the app is required for each person. However, two or more systems will work simultaneously on the same wireless network.

No, the alert thresholds are fixed and cannot be modified by the user.

Location services is required during initial Wi-Fi setup and to reconnect a Home Medical Hub to Wi-Fi. It is recommended that location services remain active during monitoring.

The screen will display a “low pulse rate confidence” message and recommended actions.

Yes, monitoring history is available from the Main Menu.

Follow on-screen instructions for recommended actions. In the event of a Level 3 Alert, the system notifies dispatch for EMS.

The system continues to monitor and send data to the cloud. If a text notification is triggered, the Home Medical Hub will send data to the cloud, which will trigger a text notification to your Emergency Contacts.

You should use Opioid Halo for as long as your care provider recommends.

Opioid Halo is intended for individuals 15 years and older.

As risk is detected, Opioid Halo sends escalating alarms to alert family members, friends and caregivers. When these events occur, you are alerted with audible alarms that sound on the Home Medical Hub and your smartphone. If risk level rises to Alert 2: Warning, in addition to Home Medical Hub and smartphone alarms, Emergency Contacts will receive a text message notification regarding your risk level and location. In the event of a Level 3 alarm, EMS will be notified for dispatch.

Risk Level Alarms Emergency Contact EMS Dispatch
Alert 1: Caution Audible alarms sound on smartphone and Home Medical Hub. Not Contacted Not Contacted
Alert 2: Warning Audible alarms sound on smartphone and Home Medical Hub. Text message notification sent to Emergency Contacts. Not Contacted
Alert 3: Emergency Audible alarms sound on smartphone and Home Medical Hub. Text message notification sent to Emergency Contacts. Triggers an automated wellness call that may lead to EMS being dispatched.

Data Protection and Security

Masimo Halo data is stored in the cloud and on the smartphone. Vital signs data reports are stored in the cloud. Any data entered manually is stored on your smartphone.

Third-party vendors do not have access to your personal information or data.

No, a user’s location is not stored and cannot be tracked by Masimo.

Storage and Travel

Yes, when traveling, you can use your system on a different Wi-Fi network. When a different Wi-Fi network is detected, the system will ask for a new address location if emergency dispatch services is turned on.


Symptom Potential Causes Next Steps
Vitals data not displayed or measurement values don’t look correct
  • Obstructed or misaligned sensor LED () and detector ().
  • Masimo Chip is not fully inserted or has not been properly paired.
  • Sensor is damaged.
  • Readjust alignment of the sensor LED () and detector (). Re-install the Masimo Chip and repeat the pairing process.
  • Click in the Masimo Chip and repeat pairing.
  • Review Safety Precautions for possible reasons for no readings.
  • Replace sensor.
  • Contact Masimo Customer Support.
Unable to pair your sensor to your mobile device
  • Chip is not fully inserted.
  • Bluetooth is not enabled on mobile device.
  • Sensor is damaged or sensor battery is depleted.
  • Ensure chip is inserted in the sensor and blinking green, or blinking blue if the sensor was previously paired.
  • Ensure Bluetooth is enabled on your mobile device.
  • Replace sensor if chip indicator light is orange or red.
  • For Android, ensure “Location Services” are enabled for the app.

If you have tried all of these steps but still have issues, please contact Masimo Customer Support.