Hisense AE-15K4AF1 Operation Manual page 14

ANION
Turbo
High
Mid
Low
FAN
Or
High
Mid
Low
FAN
In first power-on state, the anion function is turned on by default, and the
indicator light will be on at the same time; if the anion button is pressed, anion
function will be turned off and the indicator light will go out.
If the product is restarted in standby state, it will run in the last selected state.
When running in smart mode, the purify speed indicator light will not be on,
and the air speed will be automatically selected; in addition to smart mode
and comfort mode, the purify speed can be adjusted, and corresponding
indicator light is on;
When pressing the purify speed button to adjust purify speed, the purify
speed will circulate in the order of Low, Middle, High and Turbo in turn;
Product model used: AE-23R4AF
When running in smart mode, the purify speed indicator light will not be on,
and the air speed will be automatically selected;
When pressing the purify speed button to adjust purify speed, the purify
speed will circulate in the order of Low, Middle and High in turn;
Product model used: AE-15K4AF1