Specifications: Product Name: 4 Ports USB HUB Material: ABS Color: Black USB Port Number: 4 Transport Interface: USB 3.0 Transmission Rate: USB 3.0 port up to 5Gbps External Power Supply: 5V/1.5A-2A Usage Temperature: 0 -70 Storage Temperature: 10 -90 Cable Length: 15cm / 5.91inch Power Supply: USB 5V/600ma Features:Built-in Surge Protector, Shielded Cable, Flat Cable, Portable Operating system: For Win95/98SE/Me/2000/XP/7/8/10/vista, Linux, Mac OS 8.5 and above. Package Content: 1 X 4 Ports USB HUB 【3.0 USB High-Speed Transmission】: Multi-port usb charger supports High-Speed transmission rate 5G Mbps, Compliant with 3.0 USB version, provide the fastest charging speed to the supoort quick charging phone devices. It's also compatible for quick charging 1.1/2.0 devices and provides a fast speed for non-rapid charging devices. 【Multiple Protection Functions】: 4 port usb hub has multiple built-in safeguards, a combination of multi-safety features to provide you, fully protect against over-current, over-charging and over-heating for safe and fast charging. 【Lightweight & Easy to Carry】: USB charging hub has compact, portable, and classy design to keep your desktop well organized and cable chaos-free, convenient to store, carry out in your travel suitcase or bag. 【Multi-purpose】:Ideal connection for hard disk drives, digital cameras, scanners, printers, external CD/DVD,flash memory drives,mouse,keyboard and etc.