The HySecurity MX5552 is the SmartTouch 720 controller board used in select HySecurity and Nice HySecurity gate operator systems. It is commonly listed as "SmartTouch 720 Controller" and is part of the SmartTouch 720/725 controller family used on compatible SlideDriver II applications. HySecurity documentation references MX5552 alongside MX5626 in SmartTouch 720/725 firmware and service information. SlideDriver II parts documentation also lists MX5552 as the SmartTouch 720 controller in the electrical components section. The SmartTouch 720 should be matched by operator model, serial number, controller generation, firmware requirements, accessory wiring, monitored safety setup, and HySecurity parts diagram before ordering. Do not confuse MX5552 with MX5626, which is the SmartTouch 725 controller, or with older Smart Touch Controller boards used on previous-generation HySecurity operators.