12 Volt 2 Amp Power Adapter, AC to DC, 2.1mm X 5.5mm Plug, Regulated 12v 2a Power Supply Wall Plug Extra Long For LED, CCTV camera, and more Color: Black Input: AC 100~240V 50/60Hz 0.3A Output: DC 12V 2A (2000mA) Size of connector: - Plug diameter: 5.5mm - Plug inner diameter: 2.1mm (5.5mm x 2.1mm) 2-flat-pin plug