Female DC Wire Power Pigtails Plug Lead Cord • 5.5mm x 2.1mm Female power plug connector. • External diameter of the plug: 5.5mm. • Internal diameter of the plug: 2.1mm. Female DC Wire Power Pigtails Plug Lead Cord Features: • 5.5mm x 2.1mm Female power plug connector. • External diameter of the plug: 5.5mm. • Internal diameter of the plug: 2.1mm. • Used to connect to camera power so you do not have to cut plug which in most cases will void warranty • Center is positive • Color Coded power connecter Red (+) for Positive and Black (-) for Negative to simplify installations.