'A' Relay Package
Electric strike (ES) relay for 7901 and 7982 Series Control Boxes or the 'A' circuit ES relay assembly used in the 7902 and 7982. Series Control Boxes. Can be added to a standard control box to convert to ES operation. Includes -390 Relay, relay base and wire harness. The 3390A is included when either a 7901ES, 7902ES,7981ES or 7982ES is ordered