The Wrenn Electronic Two-Tone Horn Control is a vintage analogue horn control designed for Tri-ang Hornby Minic model trains. Made in the United Kingdom from pressed steel, this 12v DC power supply control features a two-tone horn for added realism and detail to your miniature train layout. Perfect for collectors or hobbyists looking to enhance their model train experience with a touch of nostalgia and authenticity. From my grandfathers Not sure if it works