MRC"s Amazing TECH 6 DC Power Pack Gives Railroaders Full Control Of Any Sound Decoder Equipped Loco The Tech 6 combines MRC"s legendary power pack technology, reliability and control, with our world beating BlackBox"", Operate either Analog DC / Blue Line locos, or fully functional dual-mode sound decoder-equipped locos, or any DCC decoder equipped loco, 2 amp capacity for ""HO"" scale, Mode switch selects between analog DC or BlackBox technology, Smooth linear motor control in either mode, Full 28 N, M, R, A, functionality lets you access all your locos have to offer, Optional walk around capability using MRC"s plug ‘n play technology, SKU: SPWS2884