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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
4.8 ★★★★★
Based on 5 reviews
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Product Reviews
★★★★★ 5
Great Buy
Size: Large, Color: Black
True to size. Material is nice and thick. Perfect attire for Wedding or any formal event.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 3, 2026
★★★★★ 4
Pants run small
Size: 3X-Large, Color: Purple
Jacket fit .. but pants did not. Nice suit though.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 28, 2025
★★★★★ 5
Fits like a glove, looks like a million!
Size: Small, Color: Purple
Bought this as a gift for him and very impressed. Looks like a million dollars, fit true to size, looks tailored not cheap. Fabric is quality, stitching is done well and the pants have a nice hidden elastic extender that helps if he goes up or down a few pounds. Very impressed!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 14, 2026
★★★★★ 5
It was the perfect suit for our big day!
Size: X-Small, Color: Purple, Size: X-Small, Color: Purple
Purple size xs. He's 5'9" 145-150lbs. Very impressed with this suit. The color and pattern is awesome. The fit was good. I would say this suit runs large. Usually he wears a Medium in everything but ordered an XS and it fit very well. The pants were long we had to get those hemmed. There was a few stray strings by the end of the night in areas of the suit. But overall good quality. And for a great price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 13, 2025
★★★★★ 3
We were excited and I wanted to like it but...
Size: X-Small, Color: Black, Size: X-Small, Color: Black
We ordered this for Prom and it was supposed to be a size small, which was available for Prime ordering, but had to settle for xsmall. The pants, fortunately fit well and just need to be hemmed, the vest is great and the jacket is snug. My son has broad shoulders and I was hesitant to buy the xsmall, but it does fit just right. The only thing he would need to do is unbutton the jacket while he is dancing and maybe take it off while seated and eating dinner before prom. The material is surprisingly nice and has weight to it. I was relieved it isn't flimsy. The overall look on my son is smooth and we love the pattern and the material has shine to it. I was not happy that right out of the package, the button to the jacket could potentially fall off during because it doesn't look securely sewed in. The side of the right side of the jacket has thread already coming apart. And I found a little snag in a different location. I'm really not happy about that. I posted photos so you can see what I mean. We were excited about this suit, but it's going back. The company needs to do better with quality control.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 2, 2023
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