RedLINK compatible - Can be connected to the equipment with the THM5421R-1021 Equipment Interface Module or with the THM4000R-1000 TrueZONE Wireless Adapter

7 day (All days seaparate) programming - Smart Schedule; programs in seconds for any lifestyle - Interview based programming and installer setup

Displays in 10 square inch standard backlit screen - Conventional systems have 2 heat and 2 cool stages with standalone installation - Heat pumps have 3 heat and 2 cool stages with standalone installation - Conventional systems have 3 heat and 2 cool stages when used with the Equipment Interface Module - Heat pumps have 4 heat and 2 cool stages when used with the Equipment Interface Module

Selectable for residential and light commercial applications - Light commercial - Commercial language (occupied and unoccupied), schedule holidays and custom events, economizer and time of day.

Plain language setup, no manual needed - Alerts and User Interactions Log keeps a searchable history of alerts and setting changes to the thermostat to determine if there is a system malfunction or if the issue was caused by a user error - Saves time in troubleshooting and points the technician in the right direction - The Alert and User Interaction Logs are viewable on a computer after you download them from the thermostat to a microSD card

Customizable Service Reminders allow dealers to remind their customers when its time to call for service, when their warranty is expiring and to provide customized alerts

MicroSD port for copying the Installer Setup, Customizable Reminders, Custom Events and Holidays to multiple thermostats - MicroSD port for adding the dealer's contact information on the screen

Precise comfort control which maintains consistent comfort - Automatic or manual changeover - Horizontal mount