ExcelValley - Right Angle Mono Modular Cables - 6 Pack
Amazon.com: 3.5mm Stereo Male to Dual 3.5mm Mono Male Audio Cable, 1ft 3.5mm 1/8" TRS Male to 2 x 3.5mm 1/8" TS Male Y Breakout Cable Splitter Adapter for Headphone, Speaker :
Mono-to-Stereo Adapter Corrects Missing Sound from 1 Side
Audio Cable Double 6.35mm Male Mono Jack To Stereo 3.5mm Jack Aux Cord 3.5mm To Dual 6.5mm Adapter Jack Wirefor Ipad Laptop - Audio & Video Cables - AliExpress