ALIBRO(TM) 4 Port USB 3.0 HUB High Speed Concentrator with 2 Smart Charging Ports for iPhone,iPad,Samsung and other Smart Handheld Device Super high speed 4 port USB3.0 hub;transfer rate: 5Gbps System requirements: Windows 2k/XP/ Vista/Win7, linuk, MAC OS10.0+ A new USB 3.0 HUB which can intelligently charge your Smart Handheld Device safety,easily and effectively The multi-port design which can safe the space for you Product certification: CE. FCC. ROHS. K