Radio Thermostat Company of America CT50 Programmable Communicating Thermostat, without Module Sleek 7-day programmable thermostat with touchscreen controls Works with Wi-Fi, Z-Wave, or Zig bee USNAP Modules. Module Not included The CT50 allows you to program up to 4 independent periods per day Control up to 2 stages of heat and 2 stages of cool Works with nearly any HVAC system - including traditional furnaces and heat pumps