Digitrax DN166I0 Intermountain N scale SD40T-2 / SD45T-2 [Board Replacement DCC Decoder] N UniTrack You can use the frog

You can use the frog power contact option to energize the frog and prevent loss of power when a locomotive is passing through

Z Scale 4 Function

This easy to install Plug & Play DCC decoder works with many N scale Atlas 4 Axle (and a few 6 Axle) Diesel Locomotives including the GP40-2

Atlas 305 HO Scale Manual Turntable

NCE 5240269 LWK100

Digitrax DN166I0 Intermountain N scale SD40T-2 / SD45T-2 [Board Replacement DCC Decoder] N UniTrack You can use the frogDigitrax DN166I0 N Scale Intermountain SD40T 2 SD45T 2 Tunnel Motors Board Replacement DCC Mobile Decoder (was DN163I0) Replace the existing light board in your N Scale Intermountain SD40T 2 SD45T 2 Tunnel Motors. Golden White LED's for more realism. DN166I0 Instruction Sheet Digitrax Decoder Manual