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The best-selling digital thermostat series now has Blue. 80 Series Blue has a large 4-square-inch, easy-to-view Blue display and enhanced home comfort features. Take all the best features of the 80 Series, add exclusive Cool Savings™, dedicated programmable or non-programmable, longer battery life with exclusive battery power monitor — put it all in a sleek, compact package and you have 80 Series Blue. Tried and true now comes in Blue! • For Single Stage, Multi-Stage and Heat Pump Systems • Non-Programmable • Hardwired or Battery Powered Features: Large, 4-square-inch Blue display with easy-to-see characters Configures as manual heat/cool, auto changeover, heat only or cool only Exclusive Cool Savings™ feature saves energy during peak A/C demand periods Hydronic 2 or 3 wire applications Three anticipation settings Exclusive battery power monitor Longer battery life Easy-access battery compartment 5-year warranty Display: Large LCD with improved contrast for easier reading Lighted display for easier low-light viewing Comfort & Convenience Optional minimum and maximum temperature configurable Permanent program retention during power loss Air filter change indicator (optional) Simple “set-up” menu to activate optional features Soft-touch keypad Display temperature recalibration (+/- 4°) Performance: Dual-Powered…choice of battery-powered or hardwired, for all applications Fast (FA) or slow (SL) heating cycle anticipation Easy-to-wire terminal block Compressor lockout protection Millivolt compatible Electric heat option Dimensions: 5.1"W x 3 .9"H x 1.2"D Electrical Specifications: Rating 0 to 30 VAC, 50/60 Hz or DC 0.05 to 1.5 Amps (load per terminal) 2.5 Amps maximum load (all terminals combined) Standard Systems Gas, oil, electric Single Stage/Heat Pump/Multi-Stage Millivolt Systems 2 or 3 wire hydronic zone valve Thermal Specifications: Setpoint Temperature Range: 45° to 90° F (7° to 32° C) 80 Series Blue Rated Differential: 0.4° to 1.7° F with adjustable anticipation Operating Ambient Temperature: 32° to 105° F (0° to 40° C) Operating Humidity Range: 90% non-condensing maximum Terminals: RC, RH, C, G, W/E, W2, Y, O/B, 6, L