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This 21CM power conversion cable adopts DC 7.4x5.0mm male input to USB-C Type-C output. It supports up to 140W PD fast charging with multiple voltage output of 5V, 9V and 20V, max 7A current supply. Equipped with smart LED digital display, it intuitively monitors real-time charging parameters. Thickened copper core ensures stable power transmission and safe charging protection. Compact size is convenient for home, office and travel use, ideal for matching original laptop power adapter to charge Type-C laptops and mobile phones.