EVC-SPORT® is the additional control unit designed by Seletron for drivers who love their car's sound. The EVC Module needs to have the Bluetooth Option. With the App it's possible to control the Exhaust Valve in different ways: 1 Open and close the Valves manually 2 Auto mode, the EVC-SPORT open and close the valve automatically (requires the optional OBD data module) 3 Choose between pedal position or engine rpm for auto mode 4 Stock mode, the valves will follow the original control strategy from the car For more informations: https://seletron.com/en/chiptuning/evc-sport-exhaust-valve-control Note for Android 9+ users: The app requires Location Permissions in order to use Bluetooth. For a better experience we suggest to disable Battery Optimization settings for the App