USB Hub is not powered Means very slow charging. This USB 3.0 hub is designed for data transfer synchronization, not charging, we recommend you not to use it to charge your phone and other devices. ?Stable & safe? Equipped with a high-performance main control chip, data transmission is stable and efficient, and it can read two 1TB 2.5-inch solid-state drives at the same time. Small and lightweight, suitable for business/travel/work. ?Compatibility? Driver-free compatible with Windows, Mac OS 10.X and above, Linux, Android and other systems.USB hub for laptop, computer tower, XBOX, PS4, flash drive, keyboard, mouse, card reader, hard drive, phone OTG adapter, usb fan. ?Plug & Play?No need to install drivers, plug into the USB 3.0 port of your laptop to enjoy 5Gbps fast data synchronization, support hot swap?. ?USB 3.0 Hub Easily expand? The USB Hub is divided into 4 USB 3.0 ports, which can easily connect your USB-A devices to the laptop. Can be connected to USB flash drives, keyboard, mouse, gamepad, hard drives drives and more. ?5Gbps High-Speed Transmission? 4-Port USB Hub 3.0 5Gbps speed transmission, can transfer a high-definition movie in 3-5 seconds. Backward compatible with USB 2.0, 1.1, and compatible with OTG function (to use this function, the mobile phone needs to support OTG function).