WiFi Connected 7 Day Programmable Or Non-Programmable Thermostat, Program 7 Day On Unit Or Via Free App From Lux Products From Play Store Or Apple Store, User Option: 2 Or 4 Periods Per Day, Temporary Override & Manual Hold, Automatic Change Over Feature, Selectable Fahrenheit/Celsius Setting, Adjustable Temperature Swing, Differential, Adjustable 2 ND Stage Heat & Cool Offset, System Run Time Monitor, Air Filter Monitor, Low Battery Detection, AM/PM Clock Or Military Time Option, Easy View Large LED Back Lit Display, Easy Installation, Vertical Or Horizontal Mount, White Wall Plate Included, 3 Power Options: 2 "AA" Lithium Batteries, Not Included, C-Wire Or Micro USB, For Use On Universal Compatibility For Conventional Heat & A/C Up To 2 Stage Heat/2 Stage Cool & For Heat Pumps With Up To 2 Stage Heat, 1 Stage Cool, Including Aux/Emergency Heat, 2 Wire Heat Only Hydronic Systems, Hot Water Baseboard & Radiator, & Gas Millivolt Heaters.