The NEUTRIK part NO2-4FDW-1-A is a high-quality opticalCON DUO Chassis Connector. It features a durable black chromium plating and is designed with 4 solder contacts, 1 LC-Duplex feedthrough socket, and 1 shell ground contact specifically for SMPTE cable shield. This connector also offers excellent waterproofing abilities, meeting the IP65 ingress protection standard when mated. It is a reliable and efficient solution for any professional audio and video application where optical connectivity is needed.