DCC Concepts DCD-SA3-SM.1 Zen 3-Wire Small Stay Alive for Zen Black & Blue+ Decoders. 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.
