A single small Stay-Alive with 3-wire connections to the decoder. Totally Plug and Play with Zen decoders.
Usable with Zen Black, Zen Blue+, Lenz and ESU or any decoder with three-wire connections for Stay-Alive.
Please note that connection of a DCCconcepts Zen Stay-Alive to a non-DCCconcepts decoder may invalidate your warranty, please check documentation which came with your decoder for details.