SECOLink Wireless 16 Channel Expansion Receiver ModuleSecolink Wireless 16 channel expansion receiver module Works up to 500m in open space 100m in building Maximum wiring distance to CP up to 300 meters Compatible with SECOLINK LT5 remote control & BK, BP, BT series wireless detectors SECOLink EXT116S Expansion module EXT116S Expansion module EXT016S is used for making SECOLINK PAS series control panels compatible with SECOLINK BK, BP, BT, BV series wireless detectors. EXT116S has 1 built in relay that