To avoid the locked-rotor of motor, please don't hold on the button long time. Frequently locked-rotor will affect the life of motor gear. It is only need 2-3 seconds to fully open or fully closed. This item is in the category "Vehicle Parts & Accessories\Car Tuning & Styling\Performance Exhaust\Other Performance Exhausts". The seller is "mieiel6792014" and is located in this country: GB.