White Rodgers Economy Mechanical Thermostat is compatible with most single-stage heating and cooling systems, making it a versatile choice for your home or recreational vehicle. It works seamlessly with most 24-volt and millivolt systems and is mercury- for added safety. This thermostat features an adjustable heat anticipator and a reliable bi-metal design to ensure accurate temperature control. I for use in R and mobile homes, it comes complete with a decorative wallplate, mounting hardware, and an easy-to-follow installation guide. The off-white color blends well with most interiors, and the package includes one thermostat in a convenient clamshell package. Model Number: M100