MRC O/G scale 'Sounder' AC/DC diesel sound only decoder. The MRC 'Sounder' is a sound-only decoder with speaker that is easily added to any 3-rail AC, Analog (DC) G scale or 2-rail O scale locomotives, or rolling stock equipped with wheel pickups. Not compatible with DCC, TMCC or DCS.

Features:

• Easy installation - simple 2-wire solder hookup
• 4 synchronized prime mover sounds: Alco 244, SD60, SD70 & EMD567F units
• 40mm speaker included
• Dimensions: 74.2mm x 18.2mm x 11.8mm
• MRC warranty

Provides synchronized diesel rumble when using an AC or DC power pack, plus bell and horn sound when using an AC power pack equipped with bell and horn buttons. The optional #1824 radio transmitter provides additional sound functions (sold separately).