... -2,12V/24V,JGK-505valve with aluminum coil or JGK-502 valve with copper coil ,Dual tone electric air horn One ... ,12V or 24V,JGK-505valve(with aluminum coil)or JGK-502 valve(with copper coil) ,flat base cover,Dual tone electric ... -2,12V/24V,JGK-505valve with aluminum coil or JGK-502 valve with copper coil ,Dual tone electric air horn