N Scale Universal DCC Steam Sound Decoder with speaker

HO DCC Steam Sound Decoder with 23mm baffled speaker

HO DCC Steam Sound Decoder with 28mm baffled speaker

HO Advanced DCC Steam Sound Decoder with 23mm speaker

N Scale Universal DCC Diesel Sound Decoder with speaker

HO Advanced DCC Steam Sound Decoder with 28mm baffled speaker

HO DCC Diesel Sound Decoder with Built-in speaker

HO DCC Drop In Diesel sound decoder with Built-in baffled speaker