The DARCO ERO-32 MN adjusts the performance of electric and electro-technical appliances, such as ventilation engines or lighting systems. It is designed for indoor use. It is compact, intuitive to operate, and attractive. The minimalist design makes it unique among its peers. Its light interface communicates the device’s operational status or a system malfunction. Rotating the front shield smoothly reveals the light piping on the edge. It smartly dims its own brightness, adjusting to its surroundings, remaining discreet after nightfall. The device can be installed in the wall for the best visual effect, or on the wall, using a back cover.