The Hornby Accessories R044 OO Gauge Passing Contact Switch & Cables is a ready-to-go analogue control device designed for model railways and trains. This black switch operates at a voltage of 12V and is suitable for DC power type systems. Measuring 6cm in length and weighing 0.2kg, this Hornby product is perfect for collectors and enthusiasts aged 17 years and up, providing a seamless and precise control system for their model railway setup.