... experience, with 6 years of knowledge on the led display screen,led sign, led module, our product have get CE,RoHS,ISO9001, ... assembly demands.JHG advantages of outdoor led vedio curtain,led module,led product 1:we have 6 years led experience 2:ISO:2008 ,CE ... 5:professional technical team,all have enough experience in LED JHG LED vedio curtain products series style : indoor(dot matrix): φ3 , φ ...