Female DC jack convert to screw terminal if you need to connect a DC power wall wart to a board that doesn’t have a DC jack. It is a very standard 2.1mm female head that can connect to the male DC jack. You only have to screw your cable into the back with no splicing or crimping and plug in. The terminals are marked with positive and negative terminals to avoid confusion.
Remark:
Simply & Professional appearance for cabling
Easier for installation, save time and more securer cable connection
No electrical tap, No splicing, no crimping, but only a small screw driver
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Compatible with many DC wall power supplies
Connector Dimensions: 5.5mm (0.2") jack, 2.1mm (0.08") center pin diameter
Outer Dimensions: 35.3mm (1.39") length x 13.5mm (0.53") width x 11.3mm (0.44") height