Ultra Slim 4-Port USB 2.0 Data Hub with Aluminum Shell by KeagTech Compact unibody aluminum design effectively saves precious desk space. Green LED indicates normal operation. Compatible with all Windows/Mac/Linux systems. Plug-and-Play; hot-plugging; driver free LED indicator reveals power status and hub working status. Apple notes: Note that some devices such as the Apple SuperDrive look for Apple-specific signaling and will not work when connected through any USB hub. Size: L 15CM * W 3.5CM * H 1CM