C2G 6in 4-Pin 3.5mm Microphone and Headphone Breakout Adapter - Y-Cable Adapter - 27394 - Audio & Video Cables - CDW.com
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Amazon.com: Point Source Audio CM-i3-4F | Dual In Ear Intercom Headset Microphone 4 Pin Female XLR : Electronics
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Dekoni Audio Balanced 4 Pin XLR Cable for Sennheiser HD800, HD800S & HD820 Headphones - 1.2M Length | Dekoni Audio
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