The Digitrax DT402D Duplex Radio-Equipped Digital Controller is a black plastic device designed for model railroads and trains. Manufactured in 2009, this 1:87 scale controller operates on DC power and is compatible with DCC control systems. It is a ready-to-go pre-built unit with a voltage of 12V, making it a reliable choice for hobbyists looking to enhance their model railroad setup with digital control capabilities. With the trusted brand of Digitrax, this controller is tested and working to provide a seamless and efficient experience for train enthusiasts. Tested and working sold as is thank you.