The thermostats are wall-mounted with an easy-to-use digital interface featuring dedicated buttons for fan control, mode selection (cooling or heating), and a button for filter cleaning or monitoring outdoor units. This model is designed to work efficiently with air conditioning systems with a capacity of [25 tons]. Providing precise and reliable control over energy consumption. (((((( All are working and sound))))) Only one thermostat remains [1], the rest have been sold. Contact via private message.