SeQual
Eclipse

Respironics
Evergo 

Inogen
One

Invacare
Flyer XPO2

Delivers
Pulse Flow
and
Constant Flow

Delivers
Pulse Flow
Only

Delivers
Pulse Flow
Only

Delivers
Pulse Flow
Only

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Recommended
for Walking
and Sleeping

Recommended
for Walking
Only 

Recommended
for Walking
and Sleeping

Recommended
for Walking
Only 

Setting "2"
Delivers
32 milliliters
20 breaths/min

Setting "2"
Delivers
23 milliliters
20 breaths/min

Setting "2"
Delivers
15 milliliters
20 breaths/min

Setting "2"
Delivers
?? milliliters
20 breaths/min

Setting "3"
Delivers
48 milliliters
20 breaths/min

Setting "3"
Delivers
35 milliliters
20 breaths/min

Setting "3"
Delivers
23 milliliters
20 breaths/min

Setting "3"
Delivers
36 milliliters
20 breaths/min

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———————

———————

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Manufacturers
Warranty
3 Years

Manufacturers
Warranty
2 Years

Manufacturers
Warranty
3 Years

Manufacturers
Warranty
5 Years

Battery Life
1 to 4 Hours

Battery Life
4 to 12 Hours 

Battery Life
2 to 3 Hours

Battery Life
2.5 Hours 

Weight
17 lbs.

Weight
10 lbs. 

Weight
10 lbs. 

Weight
6 lbs.