They are for HO scale use

and Signal – Analogue

both sold separately) Super Detail Your Bridge

The Trainz SKU for this item is P12383222

Here is an Atlas 1008002-1 Pennsylvania 4-4-2 Steam Locomotive and Tender

MRC 1917 HO Drop-In Decoder - Platinum Series Fits Atlas Alco S2 & S4 DwDetails-0.68-0.34-9.15-6.15-5.15-2 They are for HO scaleThis is an MRC 1917 HO Scale Drop In Sound & Control DCC Decoder Platinum Series Fits Atlas Alco S2 & S4. Platinum Series16 bit decoders feature MRC's versatile back EMF feature that uses enhanced feedback circuitry to instantly adjusts the motor's speed feedback. Air compressor, blower and other sounds can be manually activated on or off. The air compressor sound is synched with the RPM of the prime mover. Applying the brake sound will slow the loco