The MxPro 4 is equipped with an internal loop driver card and two on-board sounder circuits. The control panel features an LCD menu-driven graphical interface, powered by dual flash-based microprocessor technology. It operates on a 24V DC, 2 Amp High Efficiency Switched Mode power supply and charger, approved to comply with EN54 parts 2 and 4 standards. The system is on-site programmable through the on-board alphanumeric keypad or PC-Net Configuration tools.