Gaugemaster DCC91 21 pin Ruby Series Standard Size 2 Function DCC Decoder
The DCC90 is a large 8 pin decoder which is fitted with a removable 25mm harness including 2 function wires. Fitted in the decoder is a small 2 pin socket which can have the PowerPal inserted into it (sold separately), This helps keep the locomotive moving in dirty or dead track sections.
Length 21mm, Width 16mm, Thickness 4mm.