This Honeywell CT31A thermostat is a non-programmable device that can be wall-mounted in any home. It is compatible with most Honeywell and universal brands, including the CT31A model, and features an analog/mechanical control style that is easy to use. The thermostat is made of durable plastic material and comes in a sleek white color that can easily blend in with your home's decor. With a 4-inch display size, this thermostat allows easy temperature reading, while the smart home compatibility feature ensures that it can work universally with all systems. It can switch between heat, cool, and off modes, with one stage for both heating and cooling. The voltage of this device is low, making it safe and efficient to use.