Series of 13.8Vdc switching power supplies, suitable for applications that require a stable and regulated DC voltage output. The specific voltage of 13.8V is commonly used because it aligns with the nominal voltage of a 12V lead-acid battery when it is fully charged. This makes these power supplies compatible with systems that are normally battery-powered allows them to provide a stable power source even when the battery voltage fluctuates. Ideal use for radio equipment, security systems, alarm systems, access control systems, 12Vdc LED Lighting systems and central monitoring systems. For indoor use only.