Lyric T6 PRO Wi-Fi Programmable Thermostat, 20-30 Vac, 2 Heat/ 2 Cool Conventional Systems, 3 Heat/2 Cool Heat Pumps, Programmability: 7 Day, 5-1-1 Day, 5-2 Day or Non Programmable, 40-90 Degree Heat Setting, 50-99 Degree Cool Setting, Heat-Off-Cool-Auto-Em Heat System Switching, Auto-On-Circ-Follow Schedule Fan Switching, LED Back Light, Hardwired, 1 Degree Accuracy, ?? 1 Degree Differential, 5-90 % RH Non Condensing Operating Humidity Range