GoControl Z-Wave Isolated Contact Fixture Module - FS20Z-1 NA Imported Uses Z-Wave's Scene Command Class Perfect for Commercial Lighting, Dry-Contact Relays, Pool Pumps, Water Heaters, or In-Ceiling Lighting Linear has been providing best-in-class home & business control solutions for over 50-years and is a leading worldwide mfg.. of Z-Wave products Mounts inside a standard single-gang junction box