This 3-foot USB-A to Micro-B Y-Cable provides 2 USB-A Male connectors and 1 USB Micro-B Male connector providing the ideal solution for supporting the additional power required by some micro USB external hard drives connected to the standard USB ports provided by most computers.&lt;br /&gt;&lt;br /&gt;Especially valuable in situations where a single USB 2.0 port may not offer sufficient power to external hard drives the USB-A to Micro-B Y-cable can be connected to 2 ports on 1 PC to increase the power output to the external device.&lt;br /&gt;&lt;br /&gt;Aside from the additional power provided this 3-foot cable also offers pure digital data transmission for high speed file transfers.&lt;br /&gt;&lt;br /&gt;The USB-A to USB Micro-B Y-Cable is backed by StarTech.com&#39;s Lifetime Warranty.&lt;br /&gt;&lt;br /&gt;&lt;b&gt;The StarTech.com Advantage&lt;/b&gt;&lt;br /&gt;- Provides both power and data connections between a host computer (Desktop laptop netbook) and external USB storage&lt;br /&gt;- Reduces clutter and frees up space&lt;br /&gt;- Backed by StarTech.com&#39;s lifetime warranty&lt;br /&gt;- Eliminates the need for a power adapter