Network parameters and other instructionsUniversal power supply, switching power transformerThe supply voltage requirements fit into 4V-4.4V range, the current demand within the device 1a or 1aapplied DC power to the electrical requirements 4.2v1a development board, mobile hard disk, etc.The supply voltage is suitable for all kinds of needs 4.2V 1A or 1A following current DC input products, not overload operation!is power-selective attention to follow in accordance to select the voltage and current that is equal to or larger than the electrical current to the power requiredInput voltage (INPUT): 100-240V 50-60HzThe output voltage (output): DC4.2V-1APower (Maximum Power Output.): 4.2WForm: as the following pictures are physical map length 1mPolarity: Internal positive, external negativeDC Plug: 5.5*2.1MM