it has throughed ISO9000 and3c certification horns for automotive vehicles/horn/auto parts/auto speaker DetailsSDL-1202WVoltage( ... timemore than5000000 timesDiameter(mm)90mmApplicable for carsuniversal typecertifiedISO9001,2000,3CRemarks:snail-shape,yellow,other colour accepted ,super waterproof best quality and ...