This inline 2.5mm 4-Conductor Male Plug has a plastic body with a molded strain relief. The connector body unscrews to reveal solder tabs. The strain relief will fit cables up to .20" in diameter. 4 Conductor plugs and jacks are very hard to find. They may also be known as Tip-Ring-Ring-Sleeve or TRRS connectors.
Matching 2.5mm Female 4 Conductor Jack: PH-70-089B
Dimensions: 1.66" Long x .40" Diameter
QTY: 1 x 2.5mm 4 Conductor Plug