Atickbase USB Hub 4-Port Ultra-mini Interface Splitter with Power Switch LED for Android Apple iOS and Windows Mobile Devices Black Smart charging ports automatically detect your smartphone/tablet's current needs, then charges it. It supports hot-swap, meaning you can safely plug in or unplug while the PC is running. Built-in LED indicatorDesigned with a separate switch and LED indicator for each USB port to save power Portable design is fit for travel or mobile work environment and good fort saving desk space Low power consumption design provides powerful and stable power supply for each port