Network parameters and other instructionsUniversal power supply, switching power transformerThe supply voltage is within the appropriate range of needs 11.8V-12.2V, current demand in the device 0.5a or 0.5aapplied DC power to the electrical requirements 12v0.5a development board, mobile hard disk, etc.The supply voltage is suitable for all kinds of needs 12v 0.5A or 0.5A 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): DC12V-0.5AOutput (power output max): 6WLength: The total length is about one meterPolarity: DC Plug: 5.5*2.5MMOther types of power, there is a need to contact the ownerThank you for constant Lincoiah , I wish you a happy shopping!