... led queue system 1.red indoor 3digits 2.high brightness Al frame 3.with CE ROHS hot product! Carparks queue system, ... display.1,led clock display:3digits 4"2,led clock Frame: silver aluminum alloy3,Faceplate: display window cover red PVC ... structure1, Display usage: Total 3digits 4inch height character 2, Frame: silver aluminum alloy3, Faceplate: Display window cover glassTechnical norms1,clock ...