🔥New Arrival🔥Portable Oxygen Concentrator NT-02+Home Oxygen Concentrator NT-04
🔥New Arrival🔥Portable Oxygen Concentrator NT-02+Home Oxygen Concentrator NT-04
🔥New Arrival🔥Portable Oxygen Concentrator NT-02+Home Oxygen Concentrator NT-04
🔥New Arrival🔥Portable Oxygen Concentrator NT-02+Home Oxygen Concentrator NT-04
🔥New Arrival🔥Portable Oxygen Concentrator NT-02+Home Oxygen Concentrator NT-04
🔥New Arrival🔥Portable Oxygen Concentrator NT-02+Home Oxygen Concentrator NT-04
🔥New Arrival🔥Portable Oxygen Concentrator NT-02+Home Oxygen Concentrator NT-04
🔥New Arrival🔥Portable Oxygen Concentrator NT-02+Home Oxygen Concentrator NT-04
🔥New Arrival🔥Portable Oxygen Concentrator NT-02+Home Oxygen Concentrator NT-04
🔥New Arrival🔥Portable Oxygen Concentrator NT-02+Home Oxygen Concentrator NT-04

🔥New Arrival🔥Portable Oxygen Concentrator NT-02+Home Oxygen Concentrator NT-04

Regular price $1,308.99 Sale price$1,151.91
Tax included.

  • In stock, ready to ship
  • Inventory on the way
Free Shipping in US丨🚚3-6 business days fast shipping

(We don’t support 𝗣𝗼.𝗕𝗼𝘅 address)

 For those seeking a portable oxygen machine that excels both outdoors and at home, the NT-02 is your top recommendation. This model is our lightest 5L portable oxygen machine, ensuring convenient and reliable oxygen therapy wherever you go.

Comparison of NT-02/G3/NT-01(Mobile users, please swipe the chart below left and right to view the comparison details)

Model &Features
Inogen One G3
$ 999 
 $ 2495
 $ 549
 90% - 3% /+ 6%
Pulse flow
+ Release oxygen
every 3 seconds 
 Pulse flow
 Pulse flow
4.85 Pounds
 4.9 Pounds
 7.05 Pounds
8-cell battery  $169 
16-cell battery  $259
 Not Needed
 8 cell battery   $407 
16-cell battery   $618

NT-02 Highlights
✅Dual mode: Pulse dose + Release Oxygen Every 3 Seconds 
✅93% ± 3% Oxygen Concentration 
✅3-4 Hours Long Battery Lasting( Click here to get extra batteries)
Replaceable Battery (Don't need battery charger)
✅Only 4.85Lb Lightweight 
✅Full Sets of Accessories
✅Free Versatile Bag

Three Different Charging Options
✅AC Power Supply- Home/Hotel/ Office/ Indoor Use
✅DC Power Supply-Use in the Car
✅Extra Battery- Outdoor Use

VARON Portable Oxygen Concentrator NT-02 Description:

1. Portable Design for Various Occasions

Witness the future of portable oxygen concentrators, now at your fingertips! Introducing the NT-02 Portable Oxygen Concentrator by Varon - the epitome of mobility, reliability, and ease. It's your trusted companion for outdoor adventures, on-the-go convenience, or indoor comfort. Varon's legacy of creating portable, dependable oxygen solutions continues with the NT-02. Explore life with freedom, and choose NT-02.

2. Large Removable Battery

With its high-capacity 6400mAh/92Wh battery, it extends your therapy by 6-7 hours. Weighing only 4.85 pounds with the 8-cell battery or 5.57 pounds with the 16 cell battery, it not only ensures portability but also empowers customers with versatile options, catering to various lifestyles, power needs, and weight preferences. Upgrade from the NT-01, which weighed 7 lbs, and experience freedom with NT-02.
Purchasing an extra 8-cell battery, up to 6-7 hours of battery life
Purchasing an extra 16-cell battery, up to 8-9.5 hours of battery life

3. Dual Oxygen Delivery Modes

Compared to traditional oxygen concentrators, the NT-02's oxygen delivery capabilities are unmatched. It features two dynamic oxygen delivery modes: Pulse Mode, which synchronizes oxygen delivery with your natural breathing rhythm, and Automatic Flow, which delivers oxygen consistently at a set rate. These modes seamlessly transition based on your breathing patterns, ensuring optimal oxygen delivery for a wide range of users.
The dual-mode oxygen concentrator NT-02 has an innovative oxygen supply mode to provide oxygen therapy to you effectively. 
  • Compared with the only continuous oxygen mode, dual-mode oxygen can save power. This means that the NT-02 can run longer without draining the battery as quickly. 
  • Compared with the only pulse mode, the dual-mode oxygen supply can provide automatic oxygen delivery every 3 seconds. This automatic mode of oxygen delivery can help you with shallow breathing and shortness of breath get oxygen easier.

4. Stable Oxygen Concentration

Experience the NT-02 advantage with its adjustable oxygen flow rate, ranging from 1-5L/min, giving you full control over your oxygen intake for personalized comfort and effectiveness. With a high oxygen concentration of 93%±3%, every breath you take is a breath of pure, concentrated oxygen, ensuring maximum effectiveness and enhancing your overall well-being and vitality.

5. Restful Oxygen Therapy

The NT-02 is designed with your convenience in mind, featuring a built-in auto shutdown timer. You have the flexibility to set a time interval between 1 to 240 minutes, making it easier than ever to tailor your oxygen therapy sessions to your specific schedule. This user-friendly feature ensures that your NT-02 operates efficiently and according to your preferences, enhancing your overall experience.

6. Three Charging Options

AC Power Supply
Charging your NT-02 is a breeze with our AC power supply, making it the primary and convenient method. Simply plug the charger into any indoor outlet, and in about 4 hours (exact duration may vary depending on your outlet), your NT-02 will be ready to power you through your indoor activities. It's a hassle-free way to ensure your oxygen concentrator is always at your service indoors, just when you need it.

DC Power Supply
The DC power cord is your perfect travel companion for charging your NT-02 while on the move. Simply plug it into your car's, boat's, or RV's cigarette lighter socket, and you're all set. Whether you're on a road trip, out running errands, or embarking on an adventure, this charging method ensures that your NT-02 is always ready to accompany you, providing uninterrupted oxygen therapy wherever your journey takes you.

Extra Battery
Ensure uninterrupted freedom during your travels by keeping spare batteries on hand for your NT-02. With extra batteries readily available, you have the peace of mind to replace depleted ones without the need to be tethered to a power source. Stay on the move and enjoy continuous oxygen therapy wherever your adventures take you.

7. Service

Experience Confidence in Your NT-02 Purchase with Our Service Guarantee. We stand by the quality of every NT-02 portable oxygen concentrator with a comprehensive one-year warranty, providing you with peace of mind and reliable performance. Furthermore, we are proud to offer accessible local service centers across the United States, ensuring prompt parts repair and replacement services. Our commitment to your satisfaction is unwavering, as we strive to keep your NT-02 in optimal condition, extending its lifespan for your continued benefit.

Manual for NT-02


Sleep Better, Travel Easier

Our portable oxygen generator is designed for convenience and mobility.
* It’s lightweight and comes with a versatile bag for easy carrying.
The large, removable battery supports 3-4 hours of continuous use.
CECA molecular sieve and self-filtration process ensure clean, pure oxygen.
The device maintains a stable oxygen concentration of 93±3%, while the flow is 1-5L/min adjustable.
Dual oxygen delivery modes switch automatically to suit the needs of different people
Built-in alert system provides peace of mind.
The auto shutdown timer and overnight use function enable restful oxygen therapy.
An excellent choice for anyone looking for a reliable and convenient way to receive oxygen therapy.


Product Name VARON Oxygen Concentrator NT-02
Size 7.17*3.58*10.12 (L*W*H) Inches
Weight 4.85lb
Power supply DC 12~16.8V; AC100~240V; 50/60Hz
Input Power 68W
Oxygen flow 1-5L/min adjustable
Oxygen concentration 93%±3%
Battery capacity 92Wh/6.4Ah
Oxygen mode Pulse & 3 seconds steady oxygen supply
Noise ≤58dB(A)

NT-02 Components:
1X Portable oxygen concentrator
1X Instruction manual (Check the online manual here)
1X Carrying bag
2X Filter Pad
1X Battery
1X AC/DC Adapter
2X Disposable Oxygen Inhaler
1X On-board Power Cord
1X Warranty Card

Home Oxygen Concentrator NT-04

Comparison of Home Oxygen Concentrators

Varon 1-7L Home Oxygen Concentrator NT-04 Highlights:

Accessories For NT-04
✅Extra Charger
✅Extra Filters (10 pcs/Pack)
✅Extra Nasal Cannula
Extra Car Power Inverter

Extra Remote Control

Two Different Charging Options
✅AC Power Supply- Home/Hotel/ Office/ Indoor Use
✅DC Power Supply-Use in the Car

Varon Home Oxygen Concentrator NT-04 Description:

1. Complete Accessory Set Included

You'll have everything you need for worry-free oxygen therapy with VARON's home oxygen machine, the NT-04. Our package includes all the accessories you need, so you can focus on enjoying the ease of breathing. Plus, we offer masks suitable for both adults and children, catering to different age groups' needs.

2. Oxygen Generation & NebulizerTreatment

The VARON Home Oxygen Concentrator NT-04 is a versatile solution offering both oxygen therapy and nebulizer treatment capabilities. With a maximum continuous flow rate of 7 liters per minute (LPM), it delivers a consistent oxygen supply to meet your therapy needs effectively. The integrated nebulizer function allows for convenient in-home nebulizer treatments, enhancing respiratory function. Notably, the NT-04 boasts an impressive 72-hour continuous operation capability, ensuring uninterrupted therapy. Experience reliable and comprehensive respiratory support with the NT-04.

3. Smarter & Lighter

NT-04 is our lightest home model, weighing only 10.58lb. It features a sleek and modern design with a hidden display screen. The built-in backlight allows for clear visibility of the working status with just a glance. You can even choose to turn off the backlight at night, ensuring a restful sleep. With its lightweight and convenient design, the NT-04 is a perfect addition to any home oxygen therapy setup.

4. Pure & Clean Oxygen

The VARON Home Oxygen Machine NT-04 stands out from traditional oxygen concentrators with its automatic humidification function, eliminating the need for frequent water refills. This feature particularly benefits patients who experience nasal dryness from long-term oxygen therapy. We prioritize the comfort of your oxygen therapy by ensuring the produced oxygen is adequately humidified.
Additionally, the oxygen is purified and humidified through high-quality molecular sieves with strong adsorption and a 10-stage filtration system before reaching you. This process guarantees that every breath you take is clean and of high purity, enhancing the overall effectiveness of your therapy.

5. Quieter, Noise Below 42dba

The low noise of NT-04 is suitable for indoor use, makes you concentrate more on work and study during the day, and enjoy a deep sleep without interruption at night. 

6. Easy To Operation

NT-04 has timing, SOS, remote control, and sleep mode. These functions can help you have a comfortable experience in your daily life.

7. Service

Experience Confidence in Your NT-04 Purchase with Our Service Guarantee. We stand by the quality of every NT-04 home oxygen concentrator with a comprehensive one-year warranty, providing you with peace of mind and reliable performance.


Product Name VARON Oxygen Concentartor NT-04
Size 8.03*8.43*11.02 inches
Weight 10.58 Lb
Rated Voltage AC230V/50Hz; AC110V/60Hz
Input Power 120W
Oxygen Flow Rate 1-7L/min adjustable
Oxygen Mode Continuous
Oxygen Concentration 30%-93%
Atomization Rate ≥0.2mL/min
Operating Mode 72 hours
Operating Noise ≤42dB

NT-04 Components:

1X Main machine
1X Oxygen inhaler kit *1
1X Nebulization kit (NT-04 model only) *1
1X Remote control (NT-04 model only) *1
1X Instruction manual *1
1X Certificate of Conformity (attached to the manual) *1
1X Power Cord*1

About TTLife Store

How do you contact us?

Customer Service - We're here to help.

You can contact us via Email, Phone, or Chat. We will try to respond as soon as possible. Feel free to ask for advice or give us feedback on our products or services. We're here to provide you with the best service we can.

E-mail Us:  customerservice@oxygeneratorsale.com

Phone:+1(626) 228 1001

How do you enter a promo code for an online purchase?

You can enter your promo code at any time during checkout. 

Where can you find coupons or promos?
Subscribe to our store to gain access to exclusive coupons and promotions from TTLife. Or you can ask our customer service, we will assist you with your promo code.

When do you receive your package?

US In Stock & Free Shipping for US orders.
3-5 business days to deliver.
Accessories: 10-15 days to deliver.

The oxygen concentrators and the accessories will be shipped separately.

Customer Support

Where can you find return and exchange policies?

Return and exchange policies can be found here: Return and Exchange Policies.

How do you cancel your order?

If you placed an order and would like to cancel, please contact us to begin the cancellation process. Email address: customerservice@oxygeneratorsale.com We will get back to you within 12 hours.

How do you return your order?

First, please review our return and refund

policies. found here:  Return and Exchange PoliciesThen please get in touch with us to begin the return process. 

Email address: customerservice@oxygeneratorsale.com

Who do I contact about my refund?

Please email customerservice@oxygeneratorsale.com.questions about your refund. We will get back to you within 12 hours.

Does an oxygen concentrator need to be cleaned?
Yes, cleaning is important for any piece of equipment. You should refer to your owner's manual to find out how to properly clean and maintain your device. If you do not have your user's manual you may find a copy of it here:  OXYGEN CONCENTRATOR  MANUALS

General Product Questions

Do I need a prescription to buy a portable oxygen concentrator?

No, we don’t need a prescription.

Can you fly with a portable concentrator?
Our Products are not FAA-approved, we suggest you use them during the excursion.

How does an oxygen concentrator work?

A portable oxygen concentrator is a device that separates oxygen from the air and allows you to breathe in the oxygen on an as-needed basis. Portable oxygen concentrators can run on both AC and DC power, and they can be charged by both. This battery charge allows it to bring in air, separate the oxygen from the rest of the air, and deliver it back into your lungs at whatever rate is appropriate for you. Some portable oxygen concentrators offer both continuous flows and pulse dose settings.

The home oxygen concentrator is a device that converts air into oxygen, allowing you to breathe easier. It runs on AC power and is only compatible with home or stationary models. The concentrator brings air through the inlet vent into the machine, where it passes through a filter that catches dust and other small foreign particles before going through an oxygen separation system. The oxygen is then released through the tube and cannula in the proper dosage.

Are batteries for the portable concentrator rechargeable?
The batteries for your portable oxygen concentrator can be recharged either with the AC power cord or in the car with the DC power cord. They can be recharged inside the concentrator, or if they are external batteries, they can be charged using their cord, or in an external battery charger depending on the model and type of batteries it takes. Battery recharging time varies from concentrator unit to unit, as well as depending on how old your battery is and how much remaining battery life it has left. The average recharge time is 4 to 5 hours.

Are there any portable oxygen concentrators that are continuous flow?

Although many portable oxygen concentrators (POCs) provide only pulse dose oxygen delivery, some units also deliver continuous flow.
NT-05 is an oxygen concentrator that provides 3L continuous flow. And the battery can last up to 2 hours.
NT-02 has 2 oxygen delivery modes: Pulse Mode delivers oxygen by sensing the user's breathing rhythm, while Continuous Flow supplies oxygen at a fixed frequency. The 2 modes switch automatically according to users’ breathing patterns, suitable for a broad range of people.

Can an oxygen concentrator be stored in a cold/hot room?
The standard ambient temperature range of our oxygen concentrator is -20℃~60℃. Cold conditions can affect the operating time of portable oxygen concentrator batteries.

Continuous or pulse flow?

A continuous flow oxygen concentrator means the oxygen generator can continuously supply oxygen. But pulse oxygen concentrators usually supply oxygen based on your breathing, because pulse oxygen concentrators usually have breathing sensors.

Products of continuous flow or pulse flow?

Our NT-02 portable oxygen concentrator can supply 1-5 L/min dual mode oxygen flow, adjustable. 

Our NT-01 portable oxygen concentrator can supply 1-5 L/min pulse flow, adjustable. 

Our NT-05 portable oxygen concentrator can supply 3 L/min continuous flow, stable.

Replace filters? how often?

Separately sold, it can be cleaned or replaced every 3-6 months, this is the link


Can I use the machine for 24 hours?

Yes, all of our home oxygen machines are suitable for you, they can work for 24h/7d, even when you sleeping.

How long is the warranty?

All of our brand-new home and portable oxygen concentrators have a one-year warranty, except our used oxygen concentrator and accessories.

Oxygen Concentrator Product Questions

How do you check/read the hours on the portable oxygen concentrator NT-02?
Battery indicators: This shows the current battery capacity, which is calculated

based on the real-time voltage value and may deviate from the actual situation.

For reference only.

There are 4 battery indicators on the operation panel:

4 lights on -------- battery capacity≧90%

3 lights on -------- 90%>battery capacity≧75%

2 lights on -------- 75%>battery capacity≧50%

1 light on -------- 50%>battery capacity≧25%

1 light flashing -------- battery capacity<25%

Can you use oxygen concentrators when sleeping?
Yes, home oxygen concentrators are suitable for you, they can work for 24h/7d, even when you sleeping.

How long can the NT-02 battery work?

Battery Duration:


8 Cell Battery

16 Cell Battery

1 Liter

3 hours 20 minutes, average

6 hours 40 minutes, average

2 Liter

3 hours, average

6 hours, average

3 Liter

2 hours 15 minutes, average

4 hours 30 minutes, average

4 Liter

2 hours, average

4 hours, average

5 Liter

1 hour 45 minutes, average

3 hours 30 minutes, average

What is the negative ion?
negative ion: Negative oxygen ions can effectively strengthen the ciliary movement of the tracheal mucosal epithelium, affect the activity of respiratory enzymes in the epithelial villi, improve the secretory function of alveoli and the ventilation and ventilation functions of the lung, relieve bronchospasm, increase lung capacity, adjust the respiratory rate, and relieve cough, etc.

What is the Atomization function?
Atomization: The atomization function of the oxygen concentrator uses expertise to help the respiratory system target this one place, so it has few side effects. At the same time, because the atomized very small particles are better absorbed, the damage to the respiratory system is also very small.

Which one is the lightest portable oxygen concentrator?
NT-03 is the lightest portable oxygen concentrator, which is only 3.1 lbs.
The battery for NT-03 is 0.66 lbs.

What are the 5L portable oxygen concentrators?
NT-01 and NT-02 provide 1-5L oxygen flow and 93% ± 3% oxygen concentration. The biggest difference is NT-01 has an internal battery that can’t be replaced. NT-01 has a replaceable battery that can last up to 4 hours.

Whats the difference between the 3 model home oxygen concentrators?

What are the different types of Oxygen Concentrators?

Two types of oxygen concentrators

Two types of oxygen concentrators

Payment Methods

Payment through PayPal. you will be redirected to their website where you can log in and finalize the payment. You can connect your credit card, debit card, or bank account to PayPal for purchasing products.

Do your products meet European standards?

Yes, our NT-01 & NT-03 are CE-certified. You can find the CE mark on our products.

On commercial products, the letters CE (as the logo CЄ) mean that the manufacturer or importer affirms the good's conformity with European health, safety, and environmental protection standards. It is not a quality indicator or a certification mark. The CE marking is required for goods sold in the European Economic Area(EEA) but is also found on products sold elsewhere that have been manufactured to EEA standards.

Shipping Costs & Tax
1. Free shipping on orders over $49 to U.S. addresses; 

    The shipping fee is $9.9 when the order value is less than $48.99.
2. $29.99 Shipping Fee to Canada.
3. $150 Shipping Fee to Mexico.
4. $100 Shipping Fee to the Rest of the World.
5. No sales tax.

Shipping Locations
1. Shipping is valid for shipping addresses in the United States, Canada, Mexico, Europe, etc. Excluding Peru, Alaska, Hawaii, Puerto Rico, and Guam.
2. We do not deliver to PO Box addresses. Please leave a specific address when you place an order, to make sure the package can deliver successfully.
Shipping Methods
All orders of oxygen concentrators are shipped out via UPS or DHL or FedEx Express.
All orders of accessories are shipped out via USPS or DHL or YunExpress, etc.

Shipping and Delivery Estimates
For Oxygen Concentrators:
Shipping time: 1-2 Business Days
Delivery time: 3-5 Business Days
For Accessories:
Shipping time: 2-3business days
Delivery time: 5-7 business days

 Customer Service - We're here to help


(Due to the rapid growth of customers and orders, we will reply within 12 hours after receiving your email, please wait patiently)

WhatsApp: +1 2133706080