Many hobbyists do not need the myriad of authentic sounds associated with MRCs DCC decoders But have stated a need for high quality sound yet low cost dropin decoders specific to the type of locomotive they have & if possible include the real sounds highend features & controls found in MRCs Platinum Series 16bit decoders Impossible task Engineered right here in New Jersey MRCs DCC team delivered Each of these six standard sizes of dropin decoders is designed to replace the original PC Board mounted on the motor plus a speaker is included with the decoder This decoder is designed & tested to operate with any NMRA compatible DCC System & MRCs exclusive line of Tech 6 DC Powerpacks 1 Prime Mover sound 16 Bit Brilliance sound 16 levels of sound volume Sound with functional dynamic braking Sound with functional service braking Air compressor with Prime Mover RPM option 15 Amp capacity 4 Horns 2 Bells 28 NMRA Accessory Functions Supports Full Readback of All CVs Supports Custom Speed Tables Excellent slow speed control & Adjustable Back EMF Speaker included