Inogen One G4, User Manual, Page: 9 / 312

5
English
Description of the Inogen One® G4 Oxygen Concentrator Chapter 2
User Interfaces (continued)
Indicator Lights
A green light indicates breath detection.
A yellow light indicates either a change in operating status or
a condition that may need response (alert). A flashing light is
higher priority than non-flashing.
Audible Signals
An audible signal (beep) indicates either a change in operating
status or a condition that may need response (alert). More
frequent beeps indicate higher priority conditions.
Backlight
A backlight will illuminate the screen for 15 seconds when the
on/off button is briefly pressed.
Input / Output Connections
Particle Filter
The filter must be in place at the intake end of the concentrator
during operation to keep input air clean.
Cannula Nozzle Fitting
The nasal cannula connects to this nozzle for Inogen One® G4
output of oxygenated air.
DC Power In
Connection for external power from the AC power supply or
DC power cable.
USB Port
For service use only.