This is a Programmable Thermostat for 1H/1C Conventional Single-Stage systems.

It makes operation easy with a clear and easy-to-read backlit digital display and intuitive buttons for functioning. The program is optional from 5/1/1 or non-programmable.  It is simple to use with mechanical slide switches to select heat or cool mode and set fan operation.　

With the flexible but easy programming, it helps you to create customized heating and cooling schedules for simple comfort. 

·High Compatibility: Forced air (gas, oil or electric), Electric furnace, Hot water steam or gravity radiant heat, Heat only systems, Heat pump w/o auxiliary or emergency heat, Millivolt, Gas fireplaces (24V), Floor or wall furnaces, Cool only systems.(TIP: Before purchasing, check to see if this thermostat is compatible with your system.)
·Not Compatible: Heat pump with auxiliary or emergency heat, Dual fuel/hybrid heating, Electric baseboard heat (110-240 volts), Line voltage, Convectors, Radiant-ceiling heat, Mini split systems and 12V RV systems. systems and 12V RV systems.
·Easy to Install and Use: Large terminal blocks with universal sub-base, can be installed within 30 minutes, clear, easy-to-read backlight LCD display and easy controls make for a user-friendly experience.
·Factory Pre-set Energy-efficiency Program: 5/1/1 easy-to-understand programming menus, flexible programming lets you sync your comfort with your schedule.
·Simple but Powerful Control: Easy-access front-load battery compartment, adjustable temperature differential (swing) for energy optimization and maximum system life, Support temperature display calibration, Convert °C/°F units, compressor delay protection (selectable on or off).