LifeChoice Activox 4L portable oxygen concentrator | ResMed
LifeChoice Activox 4L Portable Oxygen Concentrator

LifeChoice™ Activox™ 4L 

LifeChoice™ Activox™ 4L 

To keep you well equipped for mobile therapy, the LifeChoice Activox 4L portable oxygen concentrator features a long-lasting battery and advanced technologies in a simplified, lightweight design.

With no tanks to fill or heavy carts to carry around, you can breathe easy when continuing therapy away from home.


Lighter than light

At only 4.8 pounds (2.2 kilograms), the LifeChoice Activox 4L is light enough to carry throughout the day. So wherever you go, you can stay active.

The LifeChoice Activox 4L is tank-free, cart-free and hands-free. The included bag can convert into a backpack or shoulder bag for true hands-free portability.

Powered to keep up

LifeChoice Activox 4L provides freedom to travel and the ability to continue activities away from home by delivering a long-lasting internal battery.

LifeChoice Activox 4L lasts up to 10.25 hours* on a single charge, allowing you to spend the day out without worrying about needing to recharge. If you need extended hours away from home, you can recharge on the go – even while using the device.

*On setting 1

Making technology personal

In addition to its essential technologies, LifeChoice Activox 4L includes advanced oxygen purity sensors, alarm and charging notifications to keep you set up and informed for optimal therapy outcomes.

Personalized therapy starts with learning your own needs. With the unique Auto Mode and Pulse-Wave™ oxygen delivery options, therapy is automatically adjusted to maximize saturation while minimizing potential side effects.

Functional specifications

LifeChoice Activox 4L
Size 9.05” w x 7.875” h x 4.38” d
Weight 4.8 lbs.
Oxygen Purity 90% ± 3%
Oxygen Delivery PULSE-WAVE Delivery

Settings 1-4
Internal Battery Runtime* 10.25 Hours @ Setting 1

8.25 Hours @ Setting 2

5 Hours @ Setting 3

4 Hours @ Setting 4
External Battery Runtime*† 4.75 Hours @ Setting 1

3.75 Hours @ Setting 2

2.75 Hours @ Setting 3

2.25 Hours @ Setting 4
Charge Time*

4 Hours Internal

2 Hours External
Average Sound @ 2 44 dB(A)
Display Type Display Screen Standard
Warranty 3-Year Limited
FAA Approved  
*Hours are approximate and based on breaths per minute.

†Not included in Standard Package.
AutoSet for Her
AutoSet for Her
AutoSet for Her

LifeChoice Activox Oxygen FAQ’s

  • Is LifeChoice Activox 4L right for you?

    Choose LifeChoice Activox 4L if you need supplemental oxygen in a lightweight and portable oxygen concentrator that requires no oxygen tanks.

  • What are the indications for use?

    The LifeChoice Activox 4L portable oxygen concentrator is intended to be used by patients who are prescribed and diagnosed as requiring supplemental oxygen. It provides supplemental, high concentration oxygen to patients in the home, institution or travel environments. Please note, it is not life supporting nor life sustaining.

  • How does Auto Mode work?

    “Auto Mode” monitors changes in a patient’s activity level and adapts itself to their breathing requirements. In “Active-High Mode,” oxygen is tailored for short and frequent breaths required during activity. In “Rest Mode,” a more sensitive breath detection is used to identify and provide for shallow, prolonged breathing that occurs during rest.

  • How does Pulse-Wave technology work?

    Unlike typical pulse dose delivery, which can provide oxygen at a faster rate than the patient can inhale, Pulse-Wave helps match the oxygen delivery to a patient’s inhalation rate for comfort and synchrony. It also minimizes retrograde airflow to reduce side effects.

  • How long does the battery last when fully charged?

    The internal battery runtime will vary depending on the device’s setting, the patient’s breath rate and any additional modes used. As a guide, please refer to the below table:

    Device settings and estimated runtimes

    Setting 1 : 10.25 hours       Setting 2 : 8.25 hours       Setting 3 : 5 hours       Setting 4 : 4 hours


  • What maintenance is required?

    There is little maintenance besides keeping the unit clean and wiping the intake vent with a cotton swab as necessary to remove dirt. DO NOT wipe with alcohol. Designed to be durable, the LifeChoice Activox 4L comes with a 3-year limited warranty for peace of mind.

  • What kind of nasal cannula should I use?

    The provided standard 7 ft. single lumen nasal cannula or equivalent is recommended. Low flow cannulas however are not suitable.

  • Can I use the LifeChoice Activox 4L on an aircraft?

    Yes, the device is FAA approved for use on commercial flights. Visit our “Traveling with oxygen” page for useful information on flying with the LifeChoice Activox 4L.

  • What AC power supply is required?

    The LifeChoice Activox 4L power supply is compatible on both US and international AC power supplies up to 240V. It also comes with a 12V DC adapter which can be used with vehicles, including cars and boats.

How to buy

This product is no longer available. 
Please contact your local home medical equipment (HME) provider or ResMed Customer Service department with any questions.