Enclosed EnOcean Enabled Wireless Relay Transceiver / Repeater 20 Amp SPDT, 120 Vac Power, with Dry Contact InputRelay has built-in repeater function. Relay received signal from wireless switch transmitter and rebroadcasts the signal to the next relay receiver.Specifications: Voltage: 120vType: SPDTResistive: 20 AWiring: Wireless