The 14CE2-2 is a Honeywell part of their CE42 family of modulating 2-stage, electronic, thermostats designed for controlling 2-stage heating, cooling and 4-stage heat pumps. This thermostat comes with a current 24vac line, an auxiliary 24vac output, a common terminal, 1st and 2nd temperature outputs, and a power terminal. It is also equipped with a 7 day programmable functions, heating and cooling temperature range adjustment, humidity control, and a built-in energy management. The 14CE2-2 also has an advanced electronic programming functions and a compressor protection to help reduce energy consumption.