About this item Includes 2 USB 3.0 ports (blue terminal) and 5 USB 2.0 ports (white terminal) for connecting multiple peripherals to PCs and laptops The 2 USB 3.0 ports (blue terminal) support 5Gbps high-speed transmission and are backwards compatible with USB 2.0 (480Mbps). The 5 USB 2.0 ports (white terminal) support 480Mbps transmission. In order to benefit from USB 3.0 high-speed charging all devices/cables connected must support USB 3.0 specifications. The first USB 3.0 port (with lightning symbol) provides a 1.5 Amp output and can be used to charge your device. The second USB 3.0 port (without lightning symbol) provide a 900mA output while the USB 2.0 ports can provide a 500mA output each. Please use the DC Adapter (included) when connecting high-current devices and ensure total consumption across all connected devices does not exceed 4A. Compatible with all major operating systems including Windows Vista, Windows XP, Windows Me, Windows 2000, Windows 7, Windows 8, Windows 10, and Mac OS X v10.8-10.12.5. Slim case takes up minimal desk space and is easy to travel with Includes a 5V/4A DC Power Adapter (20W) and USB 3.0 ro-B to USB-A data cable.