The USB 3.0 4-Port Hub provides a high performance solution especially for notebooks which has only a few ports. It allows you to connect USB-enabled devices such as external hard drive, keyboards, digital cameras, printers, scanners. The lightweight and portable design is an ideal companion for people on the road. Important Note: - 2.4Ghz wireless devices, such as Bluetooth keyboard and mouse adapter, may not work in close to USB3.0 which may lead to malfunction. Such devices should be connect to USB2.0 port is recommended - The product is designed for data transferring ONLY not charging - The total current of 4-port must not exceed 900mA. Some current-hungry devices, such as external HDD, should be powered by an independent power adapter to get stable connection