Widely applied in: advertising LED flexible screen, stadium perimeter LED flexible screen, mobile led display for mobile media, shopping mall LED dispay screen, bank & stock exchange LED screen, train & bus station, airport, telecommunication LED screen system, stage performances and so on. High Contrast and Frequency: 4000:1 and 5000HZ, which is at a very high level to produce a vivid performance effect of our LED screen system.First-class LED chip: Supplied by Silan & Creen & Nichia other high strictly selected LED chip to ensure the long life time and high brightness of our LED screen system.Specifications Internet cable transmission 100m.