7Day Prog Thermostat

7 Day, Programmable Or Non-Programmable Thermostat, Unique Function Option To Customize 7 Day & 5 Two Day Program Settings, 2 Or 4 Periods Per Day Option, Keypad Lock, Temporary Override & Manual Hold, Selectable Fahrenheit/Celsius Setting, Adjustable Temperature Swing, Differential, Easy To Read Back Lit Display, Easy To Use, Easy Installation, Battery Powered, Uses 2 "AA" Alkaline Batteries, Not Included, Use On Most 24V Heating & A/C Systems, 1 Heat/1 Cool, Gas, Oil, Electric Or Single Stage Heat Pump Systems, 2 Wire Heat Only Hydronic Systems, Hot Water Baseboard & Radiator, & Millivolt Systems, Wall Heaters/Furnaces & Gas Fireplaces.