The MTH DCS Remote Controller Version 2.21 is a digital controller designed for model train enthusiasts. Produced by MTH, this black controller is specifically made for use with O gauge model trains. The MTH DCS Command System allows users to easily operate and control their model train setup with its digital control system. Perfect for hobbyists looking to enhance their model railroad experience with advanced technology and convenience. All sales are sold “as is” No Returns please see the pictures and please ask any questions to make sure you are fully satisfied with this before purchasing.