HAVIT HV-275U USB 3.0 7-Port SuperSpeed Hub with a 5V / 3.5A External Power Adapter, UP to 5GBPS. Windows XP/Vista/7/8 Supported Compact palm-sized grip (4.5  2.28  0.35 in) and lightweight design (2.5oz). Extremely easy to use: Plug & play, no drive required. High compatibility: Compatible with external hard drives, thumb drives, mobile phones, digital cameras, tablets and other USB devices, etc. With a 5V / 3.5A External Power Adapter, super-speed: Up to 5GBPS transmission speed Conforms to USB 3.0 regulatory standards, with data transmission security and stability guaranteed. Compatible with Windows XP/Vista/7/8, Mac OS X