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Description
Inogen One G4 Portable Oxygen Concentrator – Ultra Lightweight Pulse Dose Travel Oxygen SystemThe Inogen One G4 is the lightest portable oxygen concentrator available 2. 8 pounds with the single battery. It fits in a fanny pack, disappears into a tote bag, and sits on the seat beside you in the car without requiring a thought. For patients on settings 1 through 3 who want oxygen that is simply present without being noticed by themselves or anyone else the G4 is in a category by itself. Clinically validated for 24 7 use. FAA approved. Bluetooth
The Inogen One G4 is the lightest portable oxygen concentrator available — 2.8 pounds with the single battery. It fits in a fanny pack, disappears into a tote bag, and sits on the seat beside you in the car without requiring a thought. For patients on settings 1 through 3 who want oxygen that is simply present without being noticed — by themselves or anyone else — the G4 is in a category by itself. Clinically validated for 24/7 use. FAA-approved. Bluetooth monitoring via the Inogen Connect app.
Pulse dose only. Settings 1-3. Prescription required — bring yours when you come in or call before ordering. In-stock units available at all five SW Florida showrooms.
Questions about whether the G4 matches your prescription?
Call 866-218-0902
-- Mon-Fri 9AM-5PM · Sat 9AM-3PM · Try it in any SW Florida showroom · 10-Day No-Risk Trial
Before you order — confirm these
The G4 covers settings 1-3 only. If your prescription requires settings 4 or above, the G4 is not the right unit — call us and we will find what is. Battery life is short — plan your day around power access. Pulse dose during sleep requires physician guidance. In SW Florida summer heat, plan for 70-75% of published battery runtime. 866-218-0902
What Makes the G4 the One That Goes Everywhere
2.8 lbs — Lightest Portable Oxygen Concentrator Available
There is a specific kind of freedom that 2.8 pounds makes possible. It fits in a fanny pack. It disappears into a tote bag. It sits on the seat beside you without requiring a thought. For patients on settings 1-3 who want oxygen that is simply present without being noticed, the G4 is in a category by itself.
40 dBA · Bluetooth · Clinically Validated 24/7 · FAA-Approved
Quiet enough for a restaurant or waiting room. The Inogen Connect app provides real-time Bluetooth monitoring for patients and caregivers. Clinically validated for 24/7 waking use. FAA-approved for domestic commercial flight — the right travel companion for snowbirds flying frequently.
Know the Battery Limitation — Plan Around It
Up to 2.6 hours on the single battery, up to 5 hours on the double. The G4 is the right tool for patients always within reach of AC power — medical appointments, visiting family, short errands. For all-day use away from power, carry spare batteries or consider the G5 or Rove 6.
What's Included
- Inogen One G4 Portable Oxygen Concentrator
- 8-cell single battery
- AC power supply
- DC car adapter
- Carrying bag
- Nasal cannula
- User manual
Full Specifications
| Model | Inogen One G4 |
| Delivery Type | Pulse dose only |
| Settings | Pulse dose 1-3 |
| Weight | 2.8 lbs (single battery) · 3.3 lbs (double battery) |
| Dimensions | 7.2"H x 5.91"W x 2.68"D |
| Battery Life | Up to 2.6 hrs (single) · Up to 5 hrs (double) |
| Noise Level | 40 dBA |
| Connectivity | Bluetooth · Inogen Connect app (iOS and Android) |
| AC Power | 100-240V worldwide |
| DC Car Power | Yes |
| FAA Approved | Yes — domestic commercial flight |
| Clinically Validated | Yes — 24/7 waking use |
| Warranty — Concentrator | 3-year or Lifetime |
| Warranty — Accessories | 1 year |
Complete Portable Oxygen Concentrator Buying Guide
Comparing the G4 to the G5, Rove 6, or a higher-setting unit? Our 2026 guide covers every concentrator we carry and explains the clinical differences that actually matter. Read the Complete Portable Oxygen Concentrator Guide →
Frequently Asked Questions
The G4 is the lightest unit Inogen makes — 2.8 lbs — but covers only settings 1-3. The G5 covers settings 1-6, weighs 4.7 lbs, and delivers up to 13 hours on the double battery. If your prescription is settings 1-3 and weight is the priority, the G4 is the answer. If you need settings 4-6 or all-day battery life away from power, the G5 is the right unit. 866-218-0902.
The G4 is clinically validated for 24/7 waking use. Whether it is appropriate for nighttime use depends on your specific prescription and breathing pattern during sleep. Your physician's guidance on nighttime use is essential before using any pulse dose unit overnight. 866-218-0902.
The G4 single battery delivers up to 2.6 hours; the double up to 5 hours. In SW Florida summer heat, plan for 70-75% of those figures. For patients who are always near AC power — medical appointments, visiting family, short errands — this is manageable. For longer outings, carry a spare double battery and know where you can plug in. If your day regularly takes you away from power for 6+ hours, the G5 or Rove 6 is a better fit. 866-218-0902.
Yes — FAA-approved for domestic commercial flight. The concentrator checks at the gate door; batteries must be carried in the cabin. Given the short battery life, bring multiple batteries and calculate 150% of total travel time. Call the airline at least 48 hours before your flight. 866-218-0902.
Yes. Our 10-Day No-Risk Trial lets you take the G4 home and use it in your actual life for 10 days. If it is not the right fit, bring it back and we will exchange it. No restocking fee, no fine print. Walk-ins welcome at all five SW Florida locations. 866-218-0902.
Compare Portable Oxygen Concentrators
Most Prescribed — Settings 1-6
Inogen One G5
Settings 1-6 · 4.7 lbs · 13 hrs (double) · 8-yr service life
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Latest Inogen — Longest Battery
Inogen Rove 6
Settings 1-6 · 4.8 lbs · 12 hrs 45 min · 37 dBA
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Lightest 5-Setting · Made in USA
3B Medical Aer X
Settings 1-5 · 4.25 lbs · 5.5 hrs · Magnetic cannula port
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All Pulse Dose Concentrators
Full Pulse Dose Lineup
Every pulse dose unit we carry — all settings, all weights
Browse all →
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Southwest Florida Showrooms & Nationwide Shipping
Five locations where you can hold this unit and speak with a Respiratory Therapist before buying — Venice, Sarasota, Port Charlotte, Fort Myers, and Naples. White-glove delivery available across SW Florida. Nationwide shipping on all models. Our 10-Day No-Risk Trial is available on every concentrator we carry.
📞 866-218-0902 · Mon-Fri 9AM-5PM · Sat 9AM-3PM · Find your nearest location →
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 10 reviews
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Product Reviews
★★★★★ 5
Fallen Angels, fae, vampires, oh my!
Format: Kindle
Rating: 4.5 | Spice: 2 (but a good slow-burn)
•
Main Characters: Huntyr and Wolf
•
I couldn’t wait to read this book; there was so much hype about it! And there was no doubt why. I fell in love with the characters and the plot itself. This book is mainly plot driven more than friction driven but it’s easy to follow along with. The characters are fun, easily understood. The main setting is at an academy where both the main characters are going through trials and building strength for the final test, The Transcendent. There are fantastic side characters as well. I loved the camaraderie between Huntyr and her friends. But we don’t like Lanson. 😆
We do have some plot twists that come into play throughout the book. Secrets and betrayal to be seen. I did adore Wolf and Huntyr’s relationship. It was a classic slow burn trope. They didn’t hit it off fast, but in time their feelings grew. I loved their banter, so sexy. Wolf is your next book boyfriend; Huntyr is your next vampire assassin independent bad-a*s female. Themes include loyalty, trust, self-discovery, a true slow burn romance. Side note: book ends on a angsty cliffhanger!
•
Emily, thank you for writing this awesome novel and I cannot wait to devour Book 2, Blood So Brutal! 😍
•
Happy reading, my lovelies! xo
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 21, 2024
★★★★★ 4
“My heart bows to you and you only, Huntress.”
Format: Kindle
3.5 🌟
This book popped up in my KU recommended reading suggestions and the synopsis sounded like what I was in the mood for. I'm so glad I took a chance on it. I went into this knowing absolutely nothing about it and ended up really liking it. I love when this happens.
The main characters are likeable and I easily found myself rooting for them. There is a mystery element to each of their backstories that I enjoyed watching unfold and can't wait to get more of. Wolf, in particular, has me fixated. Love him.
I found this to be an entertaining, addictive read with a plot that moves along at a good pace. It reads so easily I found myself very reluctant to put it down. Lots of twists and turns and the angst is there. A good set up for the next book to come, for sure.
My issues with this book....the dialogue feels a bit juvenile at times and there is a repetitive over use of a particular word phrasing that I found myself giving the ole eye-roll to. There are, without a doubt, some pretty cliche moments that gave me a bit of the cringe. I think this could've certainly 100% benefited from more depth regarding the world building. Perhaps the world building was sacrificed to keep the pacing quick? Just a guess. Also, the lack of consistency of character for the FMC was really evident and so she feels quite illogical at times.
Overall, this was a fun and enjoyable read that hit the spot well enough for me. That ending certainly has me impatiently pining for book 2!
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Reviewed in the United States on June 18, 2024
★★★★★ 3
Interesting take on the genre
Format: Kindle
True rating: 3.25 ⭐️
I enjoyed the fresh take on the genre. The best way I could describe the setting and world is an apocalyptic dystopian version of Farie where vampires, fae, and angles struggle to survive in what is left of the world. It was definitely interesting throwing the academy/hunger games aspect into this world as well.
Even though I guessed the final reveal early on in the book, I kept hoping I was wrong, and it would take a surprising turn. While the "plot twists" were a bit predictable to me, I still enjoyed the ride this book took me on.
Another downfall for me was the plot holes in the world building... I.E. if society has fallen and the world is in the aftermath of war, how are there trains running around the world? Just to take young adults to the trials to get into the golden city? How is the train maintained, the tracks clear, etc?
However, I did enjoy the FMC & MMC and thought they were fleshed out nicely. I also enjoyed the side characters but wish some were developed more like Ashalin (sp?). I do find myself rooting for the MCs to succeed and find happiness together, which is obviously an important aspect for romantasy.
Overall, was this an earth-shattering, mind-bending, terrific piece of literature? No. But was it the worst thing I've read this year? Also, no. This book has, to me, the bones of a great read & just needs a bit more to push it from an alright book to a great book.
Overall ratings:
Plot- 3.5⭐️
World building 3⭐️
Spice 2.5 🌶🌶
Main characters 4 ⭐️
Supporting characters 3.5⭐️
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 12, 2024
★★★★★ 5
great book
Format: Kindle
I am really excited to meet the author at the book retreat this month. I really enjoyed this world that she built and most of the female main character Huntress is so awesome. She goes through a lot in this book and the ending; wow! I wouldn't have even guessed. I highly recommend everyone to read this book.
I have been so lucky this year that almost all the books I have read have been, so far, 5 out 5 stars.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 2, 2026
★★★★★ 4
Fallen for the Fallen Angel – A Guilty Pleasure Worth Every Page
Format: Kindle
There’s something deeply irresistible about a dark academia or trial-based setting, a brooding and arrogant fallen angel, and a fierce heroine with enough sass to go toe-to-toe with him. Wings So Wicked is exactly that kind of book—and I devoured it in just a couple of days.
To be fair, the plot isn’t groundbreaking. If you’re looking for something fresh and innovative in terms of storyline, this might not be it. But if your reader heart beats faster at the mere mention of enemies-to-lovers, jealousy-fueled banter, magical trials, betrayals, and forbidden tension—you’ll feel right at home. It’s like catnip for those of us with this particular weakness.
The chemistry between the leads could have used a slightly slower burn to make the tension sizzle longer, but I still found myself completely invested in their dynamic. There are moments and phrases that feel a bit cheesy or underdeveloped, but honestly? I didn’t care. The vibes were exactly what I wanted.
This book isn’t trying to reinvent the genre—it’s here to give readers like me what we crave: high-stakes magical drama, angsty romance, and the thrill of watching a badass girl and her brooding counterpart clash and spark. If that sounds like your kind of story, Wings So Wicked will hit the mark.
Here’s hoping Book 2 turns up the heat and keeps the magic alive.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 20, 2025
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