The compact design item could give you unbelievable analog sound. DESCRIPTION: Features:100% brand new and high qualitySpecially designed for normally aspirated carsA wonderful item to your car which without torboProfessional installation will be strongly recommended Specifications:Color: Red + blackMaterial: ABS plasticWeight: 750gHeight: Approx. 11cmDiameter: Approx. 12cmApplied Vehicle: Universal cars Installation Instructions:1. Connect red wire to positive battery terminal2. Connect black wire to negative terminal3. Connect switch wires (blue and green) through fire wall to accelerator pedal.4. Install micro switch to accelerator pedal5. Connect switch to the normally closed terminal and earth terminal on micro switch6. Push accelerator fully in when releasing the speaker makes dump valve sound. INCLUDED:1 x Car Fake Dump Valve Electronic Turbo1 x Set of Strap1 x Holder1 x Set of Srew and Nut