DSE 2019: NEC Display Shows C551 and C651Q Displays with UM351W Projectors for Digital SignageMarch 29, 2019 | Home / March 29, 2019 rave-video / DSE 2019: NEC Display Shows C551 and C651Q Displays with UM351W Projectors for Digital Signage DSE 2019: NEC Display Shows C551 and C651Q Displays with UM351W Projectors for Digital Signage