US plug 5V3A Switching Power Supply AC/DC Adapter 5V3A DC Voltage Regulator Power Adapter DC5.5*2.1MM port
Parameter:
Input: 100V~240V , 50~60Hz
Output: DC 5V 3A / 3000mA 15W / Floating +/- 5%
DC plug size Outer Diameter: 5.5mm . Inner Diameter: 2.1-2.5mm
Plug Specifications:US Plug
The adapters Connector: inside positive (+) . outside negative (-)