This is a USB hub from BUFFALO. ① The top-mounted 3 ports plus 1 side port configuration improves usability, allowing you to easily plug and unplug devices you want to use at your fingertips with one hand. ② This USB hub supports "USB 3.0," the higher-end standard of the widely used USB 2.0. ③ It supports both bus power and self-power, allowing you to switch between them depending on the situation. An AC adapter that can be powered from an outlet is included, so it works well even when connecting USB devices with high power consumption, such as HDDs. USB devices with low power consumption, such as USB memory sticks, can be used directly without power from an outlet. ④ The 1m cable length allows you to extend the hub本体 to your fingertips, making it easy to connect compatible devices. The USB cable is directly attached, so you don't have to worry about losing it. There are no noticeable scratches, but there is some aging, such as cable kinks, that occurred during storage. Please understand that this is a used item. This is a personal inspection. Please feel free to comment if you have any questions or would like to negotiate a price. Thank you. Model number: BSH4A110U3BK Number of ports: 4 (3 top + 1 side) Accessories: AC adapter * Outer box and instruction manual are not included. Please understand.