The TS-451 provides a high performance & high capacity storage solution for SOHO & home, workgroup, and SMB users. Powered by the advanced QTS operating system, the TS-451 performs as an easy-to-use yet powerful NAS for data backup, file synchronization, remote access, home entertainment, and is ideal for users to build a personal cloud to access their data easily. Features: Transcode Full HD videos on-the-fly or offline Play 1080p videos with 7.1 channel surround sound pass-through via HDMI output Create a personal cloud and stream your multimedia library via DLNA, AirPlay, and PLEX Centralize your file storage, sharing and backup Run a virtual machine and extend the functionality of the NAS with an integrated virtualization solution Expand the total raw storage capacity up to 60TB (with maximum 12 hard drives) with the economical QNAP expansion enclosure UX-800P