The Digitrax EVOXD Evolution Express Advanced 5A/8A Duplex Starter Set is a digital controller designed for model railroads and trains. It offers both AC and DC power type options, with a voltage requirement of 9V. This set is suitable for advanced model railroad enthusiasts aged 12 and up, providing a reliable and efficient control system for their collection. The Digitrax EVOXD Evolution Express Advanced 5A is a top choice for those looking to enhance their model railroad setup with a high-quality digital controller.