Review on Belkin F4U042BT Ultra-Slim Travel Hub - 4-Port Ultra Slim ,Black: Compact Connectivity Solution for On-the-Go Users by James Pfettscher

Ideal for powering a smartphone accessory. For example, a USB to Lightning camera cable with a USB to Ethernet adapter - without a hub, the adapter uses too much power, but works with a hub. Many USB 2 hubs are older in design due to the introduction of USB 3, but what makes this product great is that it's a new USB 2 hub. It is RoHS certified and the power supply is 5V 1A. This power supply is included This hub is very compact. Since most smartphones and tablets are limited to USB 2 transfer rates, using a USB 2 hub is a smart move if you're looking to expand their capabilities. USB 3 hubs may require a larger power supply or cause radio interference. This hub isn't designed to charge a device or transfer data to a computer, but it's great for powering standard USB accessories.