SingaLink Wireless Repeater (battery not included). The SignaLink Bridge Wireless Supervisory System can monitor any dry-contact switch such as tamper or flow switches and transmit their status wirelessly to any fire alarm panel. SignaLink Bridge uses a wireless transmitter, installed with the switch being monitored, and a wireless receiver, installed with the fire alarm panel, to fully monitor the switch’s state. Features UL 864 10th edition and ULC S527 Listed Fully supervised wireless communication bridge between all dry contact devices 2.4 GHz communication format Transmitter works on any dry contact product not listed as explosion proof Receiver provides dry contact output, compatible with any fire panel/ fire alarm system Eliminates the need for extensive wiring/conduits