BOSCH SECURITY SYSTEMS FCP-500-K 4 Wire, White FCP Kit Includes: FCP-500 Invisible Smoke Detector; White, FAA-500-BB-UL Flush Back Box, FCA-500 4 Wire Base, FAA-500-TR-W Trim Ring; White

BOSCH SECURITY SYSTEMS FCP-500-K 4 Wire, White FCP Kit Includes: FCP-500 Invisible Smoke Detector; White, FAA-500-BB-UL Flush Back Box, FCA-500 4 Wire Base, FAA-500-TR-W Trim Ring; White

Kit contains FCP-500 detector head, back box, four-wire base, and trim ring (white).