The IDEC RU4S-M-A220 is a 4PDT plug-in relay designed for versatility and environmental consideration. It features a non-polarized LED indicator, mechanical flag indicator, and snap-on yellow marking plate with additional options available. The relay's lead-free construction and cadmium-free contacts ensure eco-friendly operation. It is UL Recognized, CSA Certified, and EN Compliant, making it suitable for a wide range of applications while meeting rigorous safety standards.