Most use 3.5mm (mini) stereo connectors in male-to-male and male-to-female formats. Some adapters convert a 3.5mm male plug to two RCA female jacks for connecting a 3.5mm source to stereo RCA inputs.
Common features include 24k gold-plated connectors, tin-plated copper conductors, polyethylene foam (PF) dielectric insulation, and combined braided and foil shielding inside a PVC jacket to reduce interference and signal loss.
A common option is a 3.5mm male to two RCA female Y-splitter adapter, which splits the 3.5mm stereo output into left and right RCA inputs for receivers and home stereos.
Beveled step-down plugs and ultra-slim/low-profile plug designs allow the connector to fully seat through protective cases so you don’t need to remove the case to plug in.
TRRS (4‑conductor) adapters preserve full headset functionality: microphone support plus inline controls such as volume, play/pause, and call management, in addition to left/right audio.
Many cables and adapters use 24k gold-plated connectors for improved corrosion resistance and reduced tarnish.