Cobalt Alpha DCC Power Bus Driver and SNIFFER Adapter The Alpha Sniffer is a simple and economical way to add a separate DCC accessory power bus to any layout. It works equally well for DC or DCC users who wish to employ Alpha Alpha Mimic or Cobalt Digital products. To see this working watch a video HERE! DCD-SNX is also the perfect _sniffer U ª U U interface for easy connection of DCCconcepts _Alpha U ª U U products to DCC controllers that have sniffer ports (such as ECOS or Z21). Of course Alpha Sniffer will also work with ANY other brand of accessory decoder that allows simple _set-run U ª U U addressing of its outputs. The ideal power supply for the Sniffer is the NCE-PPK power supply