Power parameters and other instructionsUniversal power adapter, switching power supply transformerThe power supply for voltage requirements for the 4.5v range, the current demand for equipment within 1a or 1aDC power applied to the electrical needs 4.5v1a development board, removable hard disk, etc.The power supply voltage is suitable for all kinds of needs 4.5v 1A or 1A below current DC input products, can not overload to use!Power selective attention, you need to follow to select the voltage consistent electrical current is equal to or higher than the required current power supplyInput voltage (INPUT): 100-240V 50-60HzThe output voltage (OUTPUT): DC 4.5V-1APower (MAX OUTPUT POWER): 4.5WOverall: If the following pictures are all physical map length 1 mPolarity: Internal positive, external negativeDC Plug: 5.5 * 2.5~2.1MM. It can be customized 4.0 * 1.7 3.5*1.35 2.5* 0.7,