Spritech(TM) Rapid Multi-Port USB Charger(4-Port USB Charging Hub) for U disk Card Reader Mouse USB Keyboard Scanner Digital Camera USB Sound Card Hard Disk Box etc White Support hot plug, low-power. Classic design, exquisite shell Adapt the second generation of USB HUB controller, without driver, plug and play Maximum 127 USB devices, are all made of first-class quality electronics, guarantee the stability of products work. Electric current protection function: support overload voltage and instantaneous electric current protection function, safe and convenient