This LED demonstration unit demonstrates the concept of a light-emitting diode within a circuit. The unit is mounted on a base measuring 3.75 x 2.75 x 1.38 inches (95.25 x 69.85 x 35mm) with two 4mm terminals for banana plug connections. CE certified. Compatible inline with other components in the Eisco PH1029 Series. A power source is required for operation (PH0971DCAC sold separately). Suitable for physics and electronics classroom demonstrations of LED behavior and basic semiconductor concepts.