The haldex AWD system on your car is a system that is not engaged full time. This plug and play controller allows your to customize your 2nd generation haldex system to perform how you want it to. This controller is perfect for Street, Track, or Daily Driving. With a variety of modes you can tweek the engagment of the sytems to have full lock up or Map based lock up for a variety of signals. This controller will also allow you to turn off haldex to do a burnout (to heat up your tires) at the drag strip, then go to full 50/50 Haldex lock for your optimal launch. Optional Haldex ModesStock modeLock Haldex at 100/0 to 50/50Map based on Throttle signalMap based on Speed signalMap based on Boost signalMap based on Throttle and Speed signalHaldex Off (for Dyno, Burnouts or Fuel Economy) Lock ModeThe Haldex power is set by a fixed value that the user sets with the AppCan be adjusted in increments of 10% (Front/Rear)100 / 090 / 1080 / 2070 / 3060 / 4050 / 50 100 / 0 is 0% to the haldex unit but the pre charge pump is still active for Gen1 Haldex Systems Throttle ModeThe Haldex power is set by the configured value at a specific throttle position.Throttle position in increments of 10% (Front/Rear)0 – 10% 50 / 5010 – 20% 60 / 4020 – 30% 50 / 40 Vehicle Speed ModeThe Haldex power is set by the configured value at a certain velocity.Speed in increments of 20 km/h 0 – 20 km/h 50 / 5020 – 40 km/h 60 / 4040 – 60 km/h 50 / 40 Boost Pressure ModeThe Haldex power is set by the configured value at a certain boost pressure.Boost in steps of 100 mBar (1.45psi)0 – 100 mBar 50 / 5020 – 40 mBar 60 / 4040 – 60 mBar 50 / 40 Passthru ModeAll signals from the car are passed thru to the Haldex so it will function like original.The display will shows the current Haldex power. Associated PartsManual Switch for Programable Quick Model Selection (to be Wired) Download the Free AppiTunes - HEREGoogle Play - HERE On first start of the App it will search for Bluetooth devices.Select the Haldex Controller this device will be saved and used on the next startup.Connect with pincode 1234.