DRS is an overtaking aid altering the angle (opening) of the rear wing flap to reduce aerodynamic drag.
Use of DRS during the race is conditional. DRS can only be activated after the first two racing laps in the designated zones. Drivers may also use DRS when they are within one second of the car in front and when both cars cross detection point.
Dependent on race conditions, the race director can suspend its use.
The FIA estimate the speed increase to be between 10–12 km/h when DRS is in use.
DRS is disabled when the rear wing flap is in its original position (closed). This happens when the driver uses the breaks after activation.
When the flap is closed it creates more downforce giving better cornering.
KERS is a device that recovers the kinetic energy that is present in the waste heat which is created when the car breaks. It stores the energy and then transforms it into power which in turn can be used to as a booster upon acceleration.
KERS was introduced to develop an environmentally sustainable car as well as assisting drivers to overtake. Whilst there are limitations on the use of KERS, the boost button can help a driver pass the car in front and the leading driver can press his boost button to speed up and break free.