These decoders are built to eliminate annoying motor hum and buzz at slow speeds. Designed for easy installation in PROTO 2000 locomotives from Walthers and Life-Like. This Silent Running(TM) decoder has an integral NMRA eight-pin plug that's an easy fit into the socket on the PC light board in EMD GP7, GP9, GP30 and P2K-SR - Direct Plug-In, 4 EFX Outputs for Life-Like GP7, 9, 30 & SD60

SD60 locos, no additional wiring is required. Simply remove the jumper plug from the socket according to the manufacturer's instructions and plug in the decoder.