The MRC DUAL Loco Pack V Transformer Supply is a vintage control unit designed for model railroads and trains. This pre-built transformer, with a multicolor design, operates on AC power and is suitable for HO gauge locomotives. With an analog control system and ready-to-go assembly status, this transformer is ideal for hobbyists aged 17 years and up who enjoy collecting and operating DC trains. The MRC brand ensures quality and reliability in providing power and control for your model railroad layout. tested myself working perfectly