Honeywell RTH111B is a non-programmable low voltage thermostat designed for heating and cooling systems. It features a digital control style with a 1.57-inch display, portable design, and low battery indicator. The thermostat is compatible with various systems, including central furnaces, heat pumps, ductless mini-split systems, and central air conditioners. It has one heat and one cool stage, with a voltage type of low voltage (750mV) and a sensor technology of temperature. The unit is rectangular, white in color, and made of plastic. The thermostat comes with mounting hardware and a display base, and it is compatible with universal brands and models. Exact item is shown. New open box thermostat with original packaging in poor condition. For forced air - gas, oil, or electric, heat pumps without backup heat, hot water and steam, and 750 mV heating systems. Not for use with electric baseboards. Item weight 11 oz. Requires 2 AAA batteries, not included. Made in Mexico. No returns if installed. This item is a new, opened customer return. It has been inspected and passed quality control to insure the condition described and contents are accurate. Please review actual photos as stock photos are not the actual item, our photos are. You will ONLY receive exactly what is shown in photos, regardless of what might have originally been included. Please review our business policies in our store for information regarding returns, shipping and warranties.