iO HVAC Controls UT-SWM Universal Thermostat Smart Wire Module With 2 to 5 Wire Adapter

The UT-SWM, Universal Thermostat Smart Wire Module is an innovative and low-cost solution for any application where you need to control up to five (voltage free) digital outputs and only have a single pair of wires between two locations such as a thermostat and HVAC system. UT-SWM is the replacement for W1-100.