The USB hub is a small, light unit with multiple ports for plugging in USB devices. It is commonly connected to a USB port located on the back of a desktop computer using an extension cable. Once the hub is plugged in, the user can set it wherever is convenient, avoiding the hassle of accessing the rear of the system. A hub is also great for laptops with only one or two ports. SpecificationProduct Name: USB 3.0 Hub Model: H4C21- 4 Ports USB 3.0 Type A + 2-Port USB Charging Ports Material: ABS Plastic Item Weight: 56g?2.08 ounces)Item Dimension: 120*34*18(mm)?4.73*1.34*0.71inches?Package Weight: 290g?10.23 ounces?Package Dimension: 13.5*10.5*5.1CM?5.32*4.13*2.01inches?Maximum Charging Current: 2A High Speed: Data transfer speeds up to 5 Gbps, 10X faster than USB 2.0 (480 Mbps), which allows you to set aside less time for syncing.6-in-1 USB Hub: There are 6 USB Data Transfer Ports, which makes it very easy to connect Multi USB devices to your PC, laptop simultaneously, such as keyboard, mouse, card reader, mobile HDD, webcam, mp3 players, usb flash drives etc. Compatibility: Compatible with USB3.0, backwards withUSB2.0/1.1 device, provides charging for Cellphone, TabletSafety Protection:Self-protection, Anti-overload, Anti-flow function, supports hot-swapping, no installation of driverOperating System:Windows7 / 8 / 10 / Vista / Windows XP / Windows 2000 / Windows ME / NT / Windows 98 second edition/Linux/ Mac OS 10.3 and above, etc Package List1*USB Hub 1*Power adapter ( 12V / 2A,1.2m ( 3.94ft ) ) 1*User Manual 1*USB3.0-A to USB3.0-A