Go2Link Black 4-port USB 2.0 Data Hub for IMAC, MacBook Pro, MacBook Air, Mac Mini, Desktop and Laptop Appearance is compact. Anti-fire ABS material, sturdy and durable. Supporting plug and play and hot plug. And maximum transfer rate can up to 480Mbps. Over current protection, short circuit prevention and FCC certification to ensure the complete protection for you and your devices. Supporting Windows XP/Vista/7, Mac OS 9.1 or higher.