Ultra-Premium Audiophile Y adapter with two 1/8 inch female mono phone jacks (left and right) to a single stereo 1/8 inch male plug. Made in USA. - Walmart.com
Amazon.com: UGREEN Headphone Splitter 3.5mm 2 Female to 1 Male Mic and Audio Y Splitter TRRS Headset Adapter Cable Stereo Compatible with Laptop PS4 Xbox PC Phone Tablet Gaming : Electronics