How to Choose the Correct Audio Cable Splitter for Headphones?

How to choose 3.5mm audio cables and adapters

Headphone splitter with headset input for iPhone? — Audiobus Forum

0.5ft (0.15m) 4-pin 3.5mm Microphone and Headphone Breakout Adapter Y-Cable, Audio Adapters and Couplers, Adapters and Couplers

Product StarTech.com 3.5mm Audio Extension Cable - Slim Audio Splitter Y Cable and Headphone Extender - Male to 2x Female AUX Cable (MUY1MFFS) - audio splitter - 20 cm

Connect Headset Audio & Mic Plugs into Jack of Tablet or Mobile Phone

StarTech.com Headset Adapter, Microphone and Headphone Splitter - MUYHSMFF - Audio & Video Cables

Syncwire Headphone Splitter, Nylon-Braided Extension Cable Audio Stereo Y Splitter (Hi-Fi Sound), 3.5mm

PLUSSOUND X6 Series Cable (Headphone Version) – Elise Audio

Best Headphone Splitters 2020: How Do They Work? How to Split Devices