... ,convenient 3,low cost,energy saving. BJ5043XXC-B1 mobile led screen truck1,multi-function,portable2,wide coverage,safe,convenient3,low ... ISO9001 certificate6,with good quality and reasonable price7,experienced LED TRUCK manufacturer in ChinaMain parameters of BJ5043XXC-B1 mobile ... up to level 8.5, energy saving:adjustment of LED screen brightness based on outdoor light,screen with automatic energy ...