The Digitrax HO #DH142 Mobile Decoder is a ready-to-go digital control device designed for model railroads and trains. Made of plastic and featuring a 1:87 scale, this vintage decoder by Digitrax is compatible with DCC control systems. With a medium NMRA plug and 1.25" harness, this mobile decoder offers convenient power and control for model railroads and trains. Perfect for enthusiasts aged 17 years and up, this United States-made decoder is a must-have for those looking to enhance their model train collection.