'This connector fully complies with the IEC 62368-1 device standard, due to its component certification according to IEC 61984. 4-pole chassis connector, size D flange in black color, countersunk holes, 3/16 flat tabs ''.speakON panel mount connectors are the standard chassis connectors for speaker/amplifier interconnections. They feature a unique metal locking system, establishing contact only when completely locked. speakON receptacles are robust, versatile and easy to terminate.'