Emerson Classic 80 Series features Low Voltage Thermostat, Stages Heat 1, Stages Cool 1, Temp. Settings per Day 4, Programs per Week 5-1-1, Terminal Designations C, G, O/B, RC, RH, W, Y, WiFi Capability No, System Switching Heat-Cool-Off, Fan Switching Auto-On, Display Size 2.2 sq in, Display Type Digital, Key Pad Lockout No, Programmable Fan No, Humidification Control No, Dehumidification Control No, Remote Sensing Capability No, Temporary Program Override Yes, Temporary Temperature Hold Yes, Battery Backup Yes.