Emerson 80 Series thermostats offer a footprint that fits the install, features that fit the homeowner and support that fits your business. With a large, backlit display, easy to use design, flexible programming and dependable performance, 80 Series thermostats are the perfect fit for every application. 4.5" Display Conventional Non-Programmable Thermostat 1 Heat/1 Cool. Single Stage (1H/1C) Non-Programmable Digital Thermostat. Backlit Display. 24 Volts Or Millivolt. System Switch-Heat, Off, Cool, Fan Switch-Auto, On. Keypad Lockout. Temperature Limits. Dual Power: Hardwire And/Or Battery. Range 45-99º F. Terminals-RH,RC,C,W,Y,G,O/B.