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This male-to-male DC extension cord uses standard 5.5mm outer diameter & 2.1mm inner diameter plugs at both ends, with 8A current carrying capacity to meet high-power DC equipment power supply demands. The 50cm moderate length easily solves the problem of insufficient original power cord length. The black flexible cable shell is durable and easy to arrange, widely applicable to surveillance equipment, LED lighting, industrial small adapters, network equipment and other devices equipped with 5521 DC interfaces.