QNAP Systems today launched the 2-bay TS-251B NAS. Powered by an Intel J3355 dual-core processor, the TS-251B provides home and SOHO users with an excellent cross-device multimedia experience with its 4K media transcoding and streaming capabilities, 4K HDMI output, and a wide range of backup and sharing applications. The TS-251B also provides a PCIe slot to expand its core functionality.