Rain Bird D16350 LSP-1 Field Decoder Line Surge Protector - 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. The Rain Bird Decoder System 2-wire path must be properly surge protected and grounded. Doing so can help prevent damage to the decoders and irrigation system and also significantly reduce troubleshooting, repair time and expense.