Solved

KERS / DRS

Hello. I am new here. I'm still trying to learn the game and I have read many tutorials about newbie players.
But after all the tutorials, I I can't understand yet what is KERS and the difference between KERS and DRS.

As I can see, DRS enabled after the first round and you can use it any time you want to make an overtake or to speed up your acceleration.
But, how about KERS? What is it and where is it? I can't see any button on race!

DRS: drag reduction system. When activated (green DRS in upper right corner) cars within a second of car in front may lower their back wing in DRS Zone. That happens automatically. 

KERS: there is no KERS in iGP! We have BOOST.

BOOST: extra energy for accelerating. If u attend the race, u have control over this.  Holding the red battery labeled with 100%. Gives u boost. It gets available in lap 2. Careful! It doesn't regenerates. U got those 100% for the race. 

DRS (drag reduction system) is a automatically overtake help in a specified zone. If you are 1 second behind a driver at the beginning of the DRS zone you will get DRS.

KERS/Boost (or how ever you want to call it :) ) is an extra energy. You have 100% and it doesn't regenerate.

Both are getting available at the beginning of lap 3 when it's dry. When it's wet the DRS will stay unavailable.

I understand! Thanks for your help.