Allows users to connect up to 4 USB peripherals or devices via a single USB port. Suitable for USB peripherals such as USB mice, USB portable hard drives and USB CD-R/RW/DVD-ROM drives. Suitable for USB devices such as USB flash memories and USB data / charging cables. Fully compliant with USB 2.0 specification. Compatible with Windows and Mac 8.6 or above operating systems. Provides high-speed data transfer speed at 1.5/12/480 Mb/s. Features over-current protection for each port. Power : 5V, 2.1A