2Pcs USB To DC Power Adapter, 5V DC4017 Female To USB A Male Adapter

What is it?This USB A to DC adapter powered or charged USB A devices by standard DC plug/adapter, Applicable to a variety of small electrical appliances, mobile phones, MP3, MP4, u disk, usb charger, notebook, night light, led light bar, small speaker, model car, fan, tablet computer, massager, wireless router, etc devices.What will I get?Material: Metal, PVC;Voltage Rated: 5V;Connectors 1: DC 4.0x1.7mm Female jack;Connectors 2: USB A male jack;Output: USB A male jack or DC 4.0x1.7mm Female jackIn the package of: 2 Pcs x DC Female to USB A Male AdapterAre there any advantages of this product?This dc to usb adapter features to use power devices with barrel jack to power and charge USB devices, perfect for any devices with Type A interface, such as computer, laptop, tablet, smart phone, game console. USB A interface can also charge DC devices. (Note: it does not support data transmission )How to use it?Tips: (The output voltage is 5V, please don't apply for 9V-12V voltage).The general output voltage of computer USB interface is 5V. Please pay attention to whether the voltage of DC interface products is consistent. If it is not consistent, it cannot be used under normal circumstances.What should I notice?Before purchasing, please make sure that the DC output of the AC adapter is the same size with the tip (voltage: 5V, size:DC 4.0×1.7mm).