CESS 2.5mm 4 Pole TRRS Male Plug Jack Audio Cables Connectors (jcx) 4 Pack 2.5mm TRRS 4 pole male plug 2.5mm 4-pin stereo connector Soldering type. Use for microphone plug, earphone plug, Audio Video AV PC Nickel plated for maximum signal transfer & durability Compatible wire size up to 4.3mm