The Lionel 4090 Powermaster Multi Control Toy Train Transformer is a powerful AC transformer designed for model railroads and toy trains. With a voltage of 110V, this transformer is capable of controlling multiple trains simultaneously. The package includes the original box and instructions, making it a convenient and easy-to-use accessory for any train enthusiast. The Lionel brand ensures quality and reliability, making this transformer a must-have for enthusiasts looking to expand their collection.