The Honeywell Home CT31A Non Programmable Thermostat is a white plastic wall-mounted thermostat designed for heating and cooling systems. It features a rectangular shape and a 3V button cell battery size. This thermostat is compatible with central furnace, central air conditioner, and central heating radiator systems. With a voltage type of low voltage and a control style of dial and analog/mechanical, it offers easy system switching for heat, cool, and off settings. The Honeywell Home brand ensures quality and reliability in maintaining optimal indoor temperatures.