This product is a USB 3.0 4-por hub. Four USB 3.0 female sockets can beexpanded at the same time, which can transfer data between the user'scomputer or mobile phone and USB flash disk, mobile hard disk andother devices at the speed of USB 3.0 standard, or charge the requireddevices. At the same time, it has a charging interface of USB-C interface,which is convenient for users to connect high-power storage devices,such as mobile hard disks. 1. Extend 4 USB 3.0 by USB-A port 2. The product conforms to USB 3.0 specification and is downwardcompatible with USB 2.0 /1.1 standard 3. The USB 3.0 HUB can be used as the charging interface to charge mobilephones, tablets and other devices 4. Driver free installation, easy to use, plug and play 5. Low power consumption, low heating temperature