Need help, can not recognize a type of cable

Hello,

I am doing an arduino project based on an existed project. I use a certain type of cable which looks like the one in the picture attached: one end is the USB interface, the other seems like the Jack… Now I should buy more cables like this, but I don’t know the name of this type. I have searched in the Arduino Store and Amazon, but couldn’t find… Really need help.

Here you go: https://www.amazon.com/s?field-keywords=usb 5.5 USB to 5.5 x either 2.1 or 2.5 mm barrel jack.

Be aware that these only provide 5V so if you're trying to plug one of these into the power jack of an Uno that's not a high enough voltage, better to either use a power supply of at least 6V or just power the thing directly through the USB port with 5V.

Ok, thanks very much. I think it will work because it's used for an extra board on an Uno and the the adapter is 5V, 1A.