Honeywell model T8624D2102 7 day programmable Chronotherm IV thermostat. For use with 24 volt 2 stage heating and two stage cooling heat systems. Items are new and unused in original box. Please call 952-884-8266 Mon thru Friday 7:00 to 5:00 or 612 518-6683 after 5:00 and on weekends. We ship nationwide. Minnesota residents will be charged sales tax.