Shenzhen Mary(MR) photoelectricity company ltd. is one of the top 10 led screen manufacturers in Shenzhen China. What we have as one of top10 ? 1> 8 years experience in R & D in led screen products (Since 2004). 2> 100 staffs engineer team in after-sale services, structure design, new led products and system technology R & D. 3 > The most automatic-processed factory with 30000 sqm production base and 6000 sqm led screens output. 4> Strictly-controlled products: Pass CE,FCC,ROHS, ETC,IP67 tests. 5> Professional OEM services for giant clients, such as Coca-cola, AT&T, TECHFRONT (world cup 3).... If you are looking for the most cost effective led screens, you are at the right place,at the right time. Visit me on youtube . http://www.youtube.com/watch?v=05GQihnznAs