Tired of having to carry around a separate wall adapter in order to power or charge your 5V devices, such as certain external hard drives, streaming media players, and Bluetooth(R) speakers? This 2m USB power cable makes it easier to power 5V DC devices that have a Type N (OD: 5. 5mm, ID: 2.5mm) barrel power connector. You can power or charge the devices through an available USB port on your laptop or desktop computer. Expertly designed and constructed of high-quality materials, the Star Tech. com USB2TYPEN2M power cable is backed by our lifetime warranty. The Star Tech. com Advantage Guaranteed reliability