The product is a new Honeywell FTT (Field Terminal Temperature) terminator resistor specifically designed for use with the Honeywell W7750 controller. The model number for this resistor is 209541B. This accessory is essential for ensuring efficient control and operation of heating and cooling systems in various industrial and commercial settings. Made by the trusted brand Honeywell, this terminator resistor is guaranteed to work seamlessly with the W7750 controller.