The full line of decoders comes in 1,and 4-station waterproof configurations, Two types of surge protection devices also: in-line suppression units (ID-N) are placed after every few decoders throughout the system, endline suppression units (ID-E) are positioned at the end of each wire path. Both types of units have wire leads for attachment to copper ground rods or plates. minimize trenching and disruption of landscaping. Hunter’s color-coded, twisted pair IDWIRE is a cost-effective, easily-installed, direct burial wiring solution that resists surges and electrical noise, while providing high tensile strength for permanent in-ground installation. The wire may also be spliced to follow piping in complex installations.