ZeroLemon High Speed 10 Port USB 3.0 HUB + 5V 2.1A Smart Charging Port with 3 Power Switches LED Indicators and 12V 4A Power Adapter [VIA VL812 Chipset] Supports Plug and Play and hot swapping. No installation of drivers required for Windows XP / Vista / 7 / 8 or Mac OS X 10.2 and above 10 Super Speed USB 3.0 ports support data transfer rates of up to 5Gbps. (Note: actual rate will depend on the capability of your device.) Safe and reliable. Voltage and Current overload protection(surge protector) protect the Hub and connected devices from electronically accident Additional charging port (2.1A) offers enough current to charge either a smartphone or a tablet at high speed. USB 3.0 ports supply 0.9A each Easy to setup: Plug & Play and Hot Swappable