The product is a GUARANTEED WORKING OEM HK42FZ011 Control Board for Carrier furnaces. This control board is compatible with Carrier, Payne, and Bryant products. As a key component in the HVAC system, this furnace control board is essential for controlling and regulating the heating and cooling functions of the system. Its model number HK42FZ011 ensures a specific fit and compatibility with the specified brands and furnaces, providing a reliable and efficient control solution for HVAC and refrigeration systems in both residential and commercial settings.