3 pole XLR male ? BNC socket Wired according to IEC 268-12: Pin 2: signal Pin 1 and 3: connected to ground. Features & Benefits: Versatile, pre-wired and ready to use adapters to reliably interlock various connector systemsProfessional look and compact space saving design, based on the X Series (XLR worldwide accepted standard)Rugged diecast shell for best reliability