THX9421R5021WW/U
2-Wire IAQ Color Touchscreen Thermostat
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3 Heat/2 Cool Conventional Systems And Heat/2 Cool Heat Pump Applications, 7 Day Program Or Non-Programmable, 40 F To 90 F Heat, 50 F To 99 F Cool Temperature Settings, White Color.

Features

For Use With THM5421R1021 Equipment Interface Module And RedLINK Accessories
Control Heating, Cooling And IAQ Equipment With Only 2 Wires At The Thermostat. Heating, Cooling And IAQ Equipment Wires To The Equipment Interface Module.
Smart Schedule - Programs In Seconds For Any Lifestyle
Patented Interview Based Programming And Installer Setup.
RedLINK™ Wireless Communication.
Multiple Staging Options To Provide Comfort Or Energy Savings
Tri-lingual - English, French And Spanish Display Options
Extend Wireless Range Of The Equipment Interface Module By Connecting A THM4000R1000 Wireless Adapter To The ABCD Terminals.