Lumex Syatems 763400A - Manual (Page 9)

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Control Button Function Description
AUTOFIRM
For maximum inflation of mattress. All other functions are disabled
unless this button is pressed again. This mode will last for 20 minutes
and then it will return to default setting automatically.
STATIC
For true low air-loss therapy mode, similar to a regular air mattress
with very low air pressure support and true low air-loss therapy.
PULSATION
For pulsating and true low air-loss therapy mode, it inflates and deflates
the mattress between two comfort levels at 2 cycles per minute.
COMFORT RANGE
The mattress has 6 comfort ranges. Use UP/DOWN button to adjust
the comfort levels. 1 is the softest & 6 is the firmest.