The QuantumZERO� USB 3.0 4-Port Bus Powered Hub expands USB connectivity of your laptop, desktop or tablet. With built-in 1 ft USB 3.0 cable it offers greater mobility at work. 4 USB 3.0 SuperSpeed ports support data transfer rates of up to 5Gbps (640MBps), saving your time. Product Features: Instant access to 4 USB 3.0 SuperSpeed ports. VIA VL812 Rev B2 chipset with latest firmware for best performance and widest compatibility. Data transfer rate up to 5 Gbps (640MBps) (actual rates depend on device and computer USB host controller). Backward compatible with USB 2.0 Hi-Speed devices (rates up to 480Mbps), and USB 1.1 Full/Low Speed devices (rates 12/1.5 Mbps). USB over-current protection up to 900 mA per port (limited to maximum USB bus power available from host computer). Sleek, lightweight design saves space, enhances mobility. Blue LED light indicates operation. Bus powered, plug and play (individual devices / USB 3.0 host controller may require drivers), supports hot swap. Product Specifications: Product Name: USB 3.0 4-Port Bus Powered Hub. Product Model: QZHB03. Chipset: VIA VL812 Rev B2. Output Interface: USB 3.0. Input Interface: 4 USB 3.0 Type A ports. Data Port Output Current: 900 mA (max). Dimensions: 103 x 38 x 24 mm. Weight: 100 g. System Supported: Windows 10/8.1/8/7/Vista/XP, Mac OSx9.1 or above, Linux (kernels 3.0 or later), Unix systems. Color: Black. Driver: No need, Plug and Play. Package Contents: QuantumZERO� USB 3.0 4-Port Bus Powered Hub with 1 ft built-in USB 3.0 cable Welcome Guide Special Notes: To ensure a stable connection, don�t use this hub with high power consumption devices (those exceeding a combined current of 0.9 Amps among all ports) such as some large-capacity hard drives. Microsoft Windows systems should install latest manufacturer USB 3.0 host controller drivers and Windows Updates for best results. Apple Mac OS X and Linux / Unix systems require latest operating system updates for best compatibility. This hub is not a standalone charger. The hub can�t supply enough power to iPhones, iPads or any other smart phones. It is not BC 1.1 / 1.2 compatible. We do not recommended this hub for use with USB 3.0 PCI-e add-on cards for older Apple Mac Pro systems because of limitations in their software support for USB 3.0 hubs. 2.4Ghz wireless devices such as wireless keyboard/mouse receivers, Bluetooth and WiFi adapters may have frequency interference issues with USB 3.0 ports, may not work in close proximity to USB 3.0 devices or hubs. Connecting wireless devices to a USB 2.0 port is recommended.