The LED CV Pin from Analogue Solutions are transparent mini jack plugs in a set of five with built-in LED for visualizing control voltages in Eurorack modular systems and semi-modular synthesizers. The special feature of these connectors are the illuminated plugs, which indicate with green or red LEDs whether the incoming voltage is positive or negative. A real eye-catcher and at the same time a great help to understand functions and to find errors.