Quality-perfect SuperSpeed USB 3.0 4-Port Hub (GL3520 Chipset, 5V/2A Power Adapter, 2 feet Cable, Compatible with USB 2.0 and Supporting VISTA/WIN XP/WIN 7/WIN 8) Chipset version:GL3520 allows this hub perform stably and perfectly compatible with your VISTA/WIN XP/WIN 7/WIN 8 system Enough power supply: 2A power adapter can provide enough capacity power supply to your high-power devices as a current enhancement if needed Supports VISTA/WIN XP/WIN 7/WIN 8 SuperSpeed USB - transmission speed up to 5Gbps