R-Tech DC12V 1A UL-Listed Switching Power Supply Adapter for CCTV Security Surveillance Cameras - Black Input: 100-240V ~ 50/60Hz 0.5A Output: 12V 1A (1000mA) / 12W Output Voltage Range: 11.4V min. / 12.6V max. Cord Length: 56in. / Connector Size: 5.5mm x 2.1mm (10mm long) Minimum Efficiency: 77.75-percent at 115 VAC input and full output load