led dot matrix series : 1,Epistar chips same as LITEON quality 2,More than 3 years warranty 3,OEM & ODM 4,3 years warranty -LED DOT MATRIX products : 5x7 series :Dot size : 1.9mm,2.54mm,3.0mm,4.5mm,5.0mm,7.62mm,10.0mm Outline size : 17.8x12.7 , 27.94x19.96 , 31.8x22.75 , 39.1x22.8 , 44.9x29.4 , 53.1x37.8 , 79.8x57 , 106.5x76 5x8 series : Dot size : 3.0mm ,7.62mm, 8.0mm, 10.0mm Outline size : 37. ...