The TS-251B combines secure data storage & multimedia entertainment into one device. Featuring a PCIe slot, the TS-251B is QNAP’s first home/SOHO NAS that means that you can flexibly extend its functionality & potential applications. You can install a QNAP QM2 card to provide M.2 SSD caching/10 Gb E connectivity & use with Qtier auto-tiering storage to enhance overall system performance; or install a wireless network card (such as the QNAP QWA-AC2600) to turn the TS-251B into a wireless access point & to wirelessly stream your multimedia throughout your home. The TS-251B supports dual-channel H.264 hardware decoding & transcoding, allowing you to enjoy watching NAS media files smoothly across various devices. The PCIe port supports installing a 10 Gb E network card, a QM2 dual-port M.2 SSD/10 Gb E card, a USB (Universal Serial Bus) 3.1 Gen 2 (10 Gbps) card, or a wireless network card. 4K media playback & online transcoding; cross-device multimedia viewing via HDMI output or streaming applications. Snapshots fully record the system status & data. If files are accidentally deleted or modified, you can quickly restore the previously-recorded data. Hybrid Backup Sync consolidates backup & sync tasks into a single app, providing multiple layers of data protection. Remotely access the apps & files on your TS-251B via my QNAPcloud & easily manage & share files. Supports containerized applications & hosting virtual machines with various operating systems.