The Schneider MCI17B-BEI-04 is a high-quality switch insert from the Merten System M range, designed for versatile lighting control. This component functions as a 1-pole, 2-way switch, making it suitable for both standard on/off applications and for controlling a single light source from two different locations. It features an integrated N-terminal, providing additional flexibility for installations that require a neutral connection, such as for orientation or control lights. Engineered for reliability and easy installation, it utilizes robust screw terminals for secure wire connections and can be mounted using either screws or claws. This insert serves as the core mechanism, intended to be combined with various cover plates and frames from the extensive Merten System M collection to achieve the desired aesthetic finish.