The open SFP slot enables you to use your preferred SFP transceiver module to meet your networking needs - use an SFP with your desired wavelength, distance, connection type to achieve an efficient network solution. (SFP sold separately.) This USB to fiber converter provides reliable connectivity while protecting your network from problems with electronic interference - a common issue with RJ45 networks. Fiber-to-the-desk connectivity (FTTD) maximizes network security, reducing the risk of data leaks of sensitive information, without compromising network speed and reliability. Compact and portable, this USB 2.0 to fiber-optic converter is powered directly from the USB port, making it easy to connect when you're on the go. Get up and running quickly. The USB to fiber-optic converter supports certified drivers for Windows, Mac and Linux®. When you plug the adapter into a USB port, you simply install the drivers and the adapter is ready to transmit over a fiber network. The US100A20SFP is backed by a StarTech.com 2-year warranty and free lifetime technical support.