Our EVOX ValveTronic App will allow the driver to control perfectly the sound of his EVOX Performance Exhaust through his Smartphone You will be able to choose between: - Closed Mode: A really quiet sound to cruise peacefully - Open Mode: A true racing sound to enhance your engine & revive your driving experience This technology offer the best alternative for your High-Performance Sport Exhaust System Our system uses the new BLUETOOTH BLE4 for the best & quickest electronical response, combined to an Atmel intern processor with low energy consumption These innovation gives the ultimate efficiency with a 1MIPS/MHZ ratio, that avoids any interference trouble