Board Replacement SoundFX® decoder for Kato AC4400 HO Locomotives Preloaded with AC4400 Sound Scheme. This unit was also sold as a stand alone SDH104K1A without the function features of the FN04.
SDH104K1A: Plug N' Play Modile Decoder with Sound FX, Includes 28mm 32 Ohm Speaker & 330uF Capacitor, 1.0 Amp/1.3Amps Peak
FN04K1: 4 Function FX3 200 ma Decoder
Retired in 2010
These units are no longer repairable as of 01/08/2013