DIGITEN Waterproof 24V AC DC to 12V DC 3A Power Converter Adapter for CCTV Camera Security Input AC voltage: AC 24V (17V-40V) or input DC voltage:(17V-26V) Output voltage: 12V Output plug:outer Diameter 5.5mm,inner core 2.1mm Output Current: 3A (MAX) With overload/over-current/overheat/low voltage protection, stable performance