BRAND NEW OPEN BOX. APPLICATION: The GLX-PL-LOC-P-4 local display replacement part is compatible with Hayward Goldline PL-P-4 Pro Logic Automation and Chlorination, and for Hayward AquaPlus Automation systems PL-PLUS. Might be compatible with older models as long as the part number is listed in the product manual. HIGH PERFORMANCE PART: The GLX-PL-LOC-P-4 local display part is designed For Use With Hayward Goldline PL-P-4 ProLogic Automation and Chlorination. It can control up to 16 pieces of equipment (4, 8 or 16 relays), two heaters and a solar system on any pool, spa or pool/spa with shared or dual appliance. Used to monitor and control system operation, make your pool experience worry and hassle-free. PROVIDE CONVENIENT CONTROL: The GLX-PL-LOC-P-4 controller has a display screen and clearly descriptive button settings, enhances the efficiency and reliability of your pool’s system, and simplifies the maintenance process with easy connectivity. EASY TO INSTALL: The GLX-PL-LOC-P-4 local display replacement is a play and plug kit, easier to replace and install. Designed for use with Hayward Goldline PL-P-4 ProLogic Automation and Chlorination.