Product Overview Ultra Green 0.56" 4-Digit LED Clock Display — Common Cathode for digital clock indicators and instrumentation applications. Character height: 14.2 mm (0.56 inches) Yellow segments on black surface Polarity: Common Cathode Ultra-bright white emission X / Y Coordinate: 0.29–0.31 Luminous intensity: 80–100 mcd Forward voltage: 2.8–3.5 V per LED Recommended forward current: 12–15 mA per LED Emitting colors available: red, blue, green, amber, orange, yellow, white