Samsung SC20F30 Serie Manuel D'utilisation page 71

POWER CONTROL
Hose
To reduce suction for leaning draperies, small
rugs, and other light fabrics, pull the tap air
until the hole is open.
Body
To control power level, just slide the power
control right and left.
MIN = For delicate fabrics, e.g.net curtains.
MAX = For hard floors and heavily soiled
carpets.
Weakly Strongly
MIN MAX
Operating cleaner _11