This is a 5-port hub with a built-in power supply and a metal chassis, compatible with 100BASE-TX. It's an energy-saving, eco-friendly type that complies with the Energy Conservation Law. Electrolytic capacitors are not used on the main board. This results in a long-life design and a highly reliable switching hub. It is equipped with a loop detection function. The LED lamp flashes to notify of network loop occurrences, prompting the resolution of network failures. Please refer to "Product Specifications" and "Product Description" for more details. Power has been confirmed, but operation has not been verified. Thank you for viewing.