What is this?Product Description: This item is a DC power adapter for external power sources, on-board transformers,LED Strip or camera wire.What will I get?Connector Size: Female 5.5mm x 2.1mm to Male 4mm x 1.7mm;Color: Black;Type:Straight;Product content: 3 Pcs x DC Power Adapter;Any advantages of this product?Good Connector: Provides convenience and compactness for everyday use. Perfect for creating cables of desired lengths or replacing faulty connectors efficiently.How to use?Connect the female end to the external power source or on-board transformer and the male end to the device requiring power.What should I notice?Ensure compatibility with your devices before use.Properly secure the connections to prevent loose connections and ensure stable power supply.