Product Description Rain Bird Decoder Line Surge Protector LSP-1 A technology long-since proven on golf courses around the world, Rain Bird decoders provide “best-in-class” field control on centrally controlled irrigation systems. Installed underground and featuring simple, low-cost wiring, decoders are an aesthetically pleasing, full-featured, economical option for reliable in-field control. Line surge protector for use with Rain Bird 2-wire decoder systems Required every 500 feet (150mts)along a 2-wire path or every 8 decoders Not necessary with FD-401 or FD-601 which include built-in surge protection