SuperTerrific 1 to 4-Way DC Power Splitter Adapter Cable. 4 Wire Cord for CCTV Security Camera 5.5x2.1mm 5.5mm x 2.1mm (1)

Fits most 12 volt security cameras, DVR's and LED light strips. Connector size is 5.5mm x 2.1mm (outer x inner diameter). Please do keep in mind that when you use a splitter like this, the power is also split. So if you use a power adapter that outputs 12V 1A with this splitter, each of the split ends will then only output 12V 0.25A (1A divided by 4) which may not be enough to operate the cameras or device you're trying to use. In this case, you'd need to upgrade to a more powerful power adapter. If you're not sure if the connector fits your item, you can check with a ruler or tape measure. Using the centimeter side, measure the diameter (across) of your existing connector. If it looks to be just a hair over half a centimeter (0.5cm), this is likely the correct size connector for you. If your CCTV system runs on 5V or 9V, it likely uses smaller 3.5x1.35mm plug instead of this.