LEGO® 4561 Railway Express with Transformer and Speed Regulator

The LEGO 4561-1 set, also known as the "Railway Express with Transformer and Speed Regulator," is a popular 9V train set from 1999. It's often referred to as the "Fast Passenger Train Set" and includes a transformer and speed regulator for powering and controlling the train. The set features a loading platform, and it comes with 665 pieces and 9 minifigures.