The UVP-2057/2157 is 2.0 inch (50.80mm) height 5X7 dot matrix display. Single color display have the of choices of three bright colors-AlGaAs red/green/red orange. Multicolor display are applicable to two colors : green and red orange. All device have gray face and white dot. The AlGaAs red LED chip are made from AlGaAs on a non-transparent GaAs substrate. The green LED chip are made from GaP on a transparent GaP substrate. The red orange LED chip are made from GaAsP on a transparent GaP substrate.