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This 30-centimeter conversion cord features DC 5.5×2.1mm female power jack on one end and USB-C female on the other, designed to convert traditional DC power input into standard Type-C power interface. Users can connect common 5.5*2.1 DC power adapters and then charge or power all USB-C small devices conveniently without replacing original power supplies. High-conductivity internal wiring ensures minimal power loss during energy transmission. Durable outer jacket effectively prevents cracking and daily wear. Perfect for DIY electronic modification, surveillance cameras, LED modules, mini routers and portable small appliances needing DC-to-Type-C power transition at home and laboratory.