The Honewell CT 31A Non-Programmable Thermostat is a white, square-shaped device made of plastic. It is compatible with universal products and has universal smart home compatibility. This thermostat, manufactured by Honeywell, operates on low voltage and features temperature sensor technology. With a control style of a switch and a system switch option for heat-cool-off, this non-programmable thermostat offers simple and efficient control for your heating and cooling systems.