I found this while organizing my home. I purchased it at an electronics store and stored it at home, unopened. It's a USB hub made by Elecom. It has 4 ports and can connect not only a mouse and USB memory, but also printers and keyboards. All ports are USB 2.0 standard. Model number: U2HS-A402BBK Color: Black It's sold for around 1300 yen (excluding shipping) at electronics stores, etc. #Elecom #elecom #USB