Mono-to-Stereo Adapter Corrects Missing Sound from 1 Side
StarTech.com Slim Stereo Splitter Cable - 3.5mm Male to 2x 3.5mm Female - MUY1MFFS - -
3pcs 2.5mm 3.5mm Audio Adapter For Headset Earphone 3.5mm Female To Female Jack Stereo Adapter Connector Audio Extension Cable - Connectors - AliExpress
Headphone Jack and Plugs: Everything You Need to Know - Headphonesty
5ft 3.5MM Stereo Mini Jack M/F Audio Extension Cable
Premium 3.5mm TRS to Dual 1/4 Inch TS Audio Cable (10FT) - Male 3.5mm 1/8" Stereo AUX Auxiliary to 6.35mm 1/4" Y Adapter Connector Wire Cord Plug Jack - Walmart.com