The Belimo ZTH US HVAC Programming Actuator Tool is a spring return damper actuator designed for use with the ZTH model #ZHT. It operates on 24V voltage and is manufactured by Belimo, a trusted brand in the HVAC industry. This tool is specifically designed for programming and controlling the ZTH model, ensuring efficient and effective operation in HVAC and refrigeration systems. Ideal for businesses and industrial applications, this product is a reliable and essential component for maintaining optimal heating and cooling conditions.