This adapter allows you to power devices like laptops using a round-tip power connector from a USB Type-C PD (Power Delivery) output. By using this product, you can directly power your laptop from a charger with PD output. This eliminates the need for the large AC adapter that comes with your laptop, making it useful for travel. - Input USB Type: TYPE-C - Output Round Tip Size: 4.8 * 1.7MM - Maximum Output: 100W When connecting to a laptop, please prepare a PD power supply with an output greater than or equal to the required power. Please also prepare a PD cable with Type-C connectors on both ends that can transmit the required power.