Edesa EIM-9530 R Manuel D'instructions page 24

Using the Booster (F2)
Booster function provides higher power for a maximum of 5 minutes. Thus you can get
a more powerful and faster cooking. The function can work in any cooking zone.
Using the Booster to get higher power
Touch Booster key (8) of the desired cooking zone. The related power display will show
"P." and the zone will reach the maximum power.
The Booster power will last for 5 minutes and then the zone will go back to the 9 power
level.
Cancel the Boost function
Touch power level slider (3) to cancel the Booster function, then the cooking zone will
revert to the power level that you wish.
Restrictions when using (F3)
The three zones were divided into two groups.
If you want to use Booster function, when you press the Booster key (8) the
selected zone will be able to reach power level "P". In the case where the power
level of the other zone within the same group is also "P", then the power of this
zone will be automatically reduced to level 9.