1525 HO Scale WOWSound 21-pin decoder – #TCS-WOW121-Steam

This decoder has a 21-Pin connector on the front. It is compatible with any TCS motherboard (which include onboard Keep-Alive™ technology) which provides easy connections for attaching your speaker, cam, and for the additional lighting functions.

Dimensions: 1.28″ x .69″ x .22″ or 32.5mm x 17.5mm x 5.6mm