blue 5*7 dot matrix
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high brightness large 4 inch blue 5x7 dot matrix led display
1.High brightness 4 inch 5x7 dot matrix blue color 2.Wide viewing angle 3.Different of colors 40057 5*7 led matrix:red,green,blue,white,yellow,orange/amber 5.RoHS CE compliant 6. Low energy 7.Stable high quality 8.ISO 9001
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