The Boxed Hornby R8013 HM2000+ Add On Power Speed Controller is a pre-built analogue speed controller designed for use with DC-powered model railways in OO gauge. Manufactured in 2000, this black plastic controller is ready to go and provides precise control over the speed and direction of your train. The Hornby brand ensures quality and compatibility with a wide range of model railway systems, making it a must-have accessory for any model railway enthusiast looking to enhance their collection.