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This 21CM power conversion cable features 7.9x5.4mm DC jack input and USB-C male output. It supports up to 140W high-power PD charging with 5V/9V/20V multi-voltage adaptation and 7A max current. The smart LED screen clearly displays real-time voltage and current, letting you monitor charging status at a glance. Made with premium core wire for stable power transmission, over-current, over-voltage and short-circuit protection ensure safe charging. Compact short length is easy to carry and arrange, ideal for powering USB-C laptops, mobile phones and other PD devices.