Caxico 4 Port Mini USB 2.0 Hub For Laptop PC High Speed 480Mbps Black Provides 4 downstream USB ports Compatible with USB2.0/1.1 Friendly design Maximum data transfer rate is 480Mbps About us (Caxico), Professional factory of cable, welcome to our store for more choices with best price. What we pursue is your satisfication of our service, not just for our goods.For any reason you are unsatisfied with our product at any time, simply contact support for exchange or refund. we will reply you about any question you ask within 24 hours