Kato USA Inc -- Power Supply 16V for Use with Smart Controller and Sound Box -- This Kato Power Supply is a great for use on standard DC layouts. It has an output of 16V DC 2.1A making it ideal for HO Scale layouts. It can be used with the 381-22019 Smart Device Controller (in place of the supplied power supply for added power) or 381-220181 Standard SX Power Pack.