MRCOOL MST05 Smart Wi-Fi Mini Stat Thermostat is a compact temperature control device designed to manage compatible ductless HVAC systems. It works by sensing indoor temperature and sending control signals to the connected equipment, allowing the system to adjust heating or cooling to maintain the selected setting. Its Wi-Fi connectivity enables convenient remote control through a com... https://www.partshnc.com/mrcool-smart-wi-fi-mini-stat-thermostat-mst05