Product interface: USB 3.0 (Compatible USB 2.0 / USB 1.1) Product features: - Top USB3.0 chip real high speed USB3.0 chip strong drive transmission rate up to 5Gbps - 4 port USB expansion support hot plug plug and play easy to use - OTG interface mobile phone panel can be used HUB - 5V / 4A adapter power supply provide strong power - Support overload voltage and instantaneous current protection function to protect the equipment and the HUB are connected by itself - Simple appearance with tablet stand - Free-drive support Windows XP / Vista / Win7 / 8 and MAC with USB - Equipped with 5V / 4A external power supply power supply more than 900mA for each interface to ensure the normal power supply equipment but also meet the 4 mobile phones charging.