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The 300 series thermostats represent a new level of sophistication and elegance in a compact package. These space saving units offer surprisingly advanced control capabilities. Use remote indoor sensors or monitor the outdoor air temperature. A set back button provides for alternate temperature settings for occupied/unoccupied periods. LEDs are readily visible for quick verification of system status. The large LCD display is easy to read, allowing for easy monitoring of time (optional on some models) and temperature. • Contemporary Design — Fits into any decor • Large LCD — Easy to read display • Occupied/Unoccupied Mode — Allows for different settings for day and night • Compressor Short Cycle Protection — Preserves integrity of HVAC system • Lockable Keypad and Front Door — Two levels of security against unwanted tampering 3 Heat/2 Cool or 2 Heat/1 Cool Heat Pump, Auto Changeover