Provides 4 external USB (Universal Serial Bus) 2.0 ports in a compact & portable form factor Connect up to 4 USB (Universal Serial Bus) 2.0/1.x devices simultaneously at up to 40 Mbps Powered from USB (Universal Serial Bus) & a compact design for easy portability & use Backed by a Star Tech.com 2-year warranty & free lifetime technical support The ST4200MINI Mini 4 port USB (Universal Serial Bus) hub means that you can turn a single USB (Universal Serial Bus) connection into four USB (Universal Serial Bus) ports, & based on a small form factor design, requires minimal space to install. An ideal laptop accessory for maximizing the number of available USB (Universal Serial Bus) device connections, the mini four port USB (Universal Serial Bus) hub operates on low levels of power, helping to ensure that you get the most out of your notebook battery. The mini four port hub supports Hi-speed USB (Universal Serial Bus) 2.0 data transfers of up to 480 Mbps, & since the hub is backwards-compatible with previous versions of USB (Universal Serial Bus), your older USB (Universal Serial Bus) peripherals will work perfectly as well. WhatÂ’s in the box 4 Port USB (Universal Serial Bus) Hub Instruction Manual