Hi, this is the 6-12866 135-Watt PowerHouse Power Supply and is ready for duty on your layout. Featuring an on/off switch for added safety, this powerful transformer is designed for use with the TMCC Track Power Controller or original PowerMaster and the newer Legacy Powermaster. The Powerhouse was originally designed for use with the Lionel Trainmaster Command System. It supplies 135 Watts of power with the Trainmaster Command Base and CAB-1 controller. I Bench tested it with locomotive on track and it worked perfectly.