The 55" NEC X551UN takes your customers' LCD video walls to new levels of impact. This professional-grade large-screen display is designed for the rigors of 24/7 operation while introducing new levels of impact to your facility. Advanced technologies of this model include direct LED backlighting for improved uniformity, full high-definition resolution (1920 x 1080) and a 5.5 mm distance between active screen areas. The X551UN also offers Intel's Open Pluggable Specification (OPS), which is the first industry-wide standardization in option slots that allows easier installation, use and maintenance of digital signage.