Foldable design for free direction 270anddegree plug rotation & 180anddegree folding Micro 4 port hub Suitable for notebook PCPDA etc USB 1.1 specification Self powered 4 port USB (Universal Serial Bus) switching hub has all the features of a normal USB (Universal Serial Bus) 2.0 hub as well as a sharing function like a switch box. It fully supports 2 users or 2 PCs to share 4 USB (Universal Serial Bus) devices by pressing the switch button. LEDs indicate the current status for the user to identify easily