LJ640U21 is a EL, EL Display screen Product from SHARP.According to SHARP's product specification sheet,LJ640U21 display has a resolution of 640×200 84PPI, Contrast Ratio is ,Viewing Angle is ,Lamp Type is self,Signal Interface is 5.0/15.0V (Typ.)(VL/VD),Brightness is 60 cd/m² (Typ.).Based on its characteristics, this model is recommended for application in and other products.The weight of LJ640U21 after packaging is 0.500KG.We have made every effort to minimize weighing variances; however, we cannot guarantee absolute accuracy.