Compatible with 2 and 3 wire thermostats, this all in one relay includes a built in 24 Volt transformer - On/Off switching

Built-in 24 V transformer for easy installation - Compatible with 24V thermostats with 2 wire connections (R,W) or 3 wire connections (R,W,C)

Immediate relay activation provides improved temperature control and comfort - Epoxy soundproofed relay ensures quiet operation

Terminal board connection enables easy installation - Low current consumption means multiple relays can be controlled by a single thermostat