Trailer horn suitable for cars, flatbeds, and vans. Very loud and high quality. Power: 110DP. To clarify, the wire coming out of it is positive, and the metal piece is ground or negative. Connect it to the chassis or connect a ground wire to it. Its installation is easy. It does not come with screws, only the horn and the base attached to it. One for 70, two for 120. The last two are available new in their box. Contact via WhatsApp or on Haraj. WhatsApp: 0551305161. Horn. Trailer horn. Trailer. Loud horn.