Check the listing for details. HONEYWELL CT31A NON-PROGRAMMABLE THERMOSTAT 1H/1C SINGLE STAGE HEATING/COOLING. Color: White, Condition: Open box. Listed at 5.98 USD. The Honeywell CT31A Non-Programmable Thermostat is a single stage heating/cooling device with a 2-wire wire configuration, suitable for wall-mounted installation. It features a 4-inch display size, 24V voltage, and operates on corded electric power with an option for battery backup. The thermostat is designed for easy control with a combination of dial, digital, and analog/mechanical control styles. It is compatible with universal brands and models, including Honeywell, and offers basic programmability for efficient temperature management in your home or office. With its durable construction and stylish design, the Honeywell CT31A is a reliable choice for maintaining optimal indoor temperatures. Note: never used.