See our 4-Conductor 3.5mm cables and adapters. Manufacturer's like the 3.5mm connector since it's a small connector and it can be configured for many different applications.
A 3.5mm connector is used in many applications, such as mono audio, stereo audio, video and stereo audio, microphone and stereo audio, and even s-video. The many different applications are possible since manufacturers assign different signals to the contact points on the 3.5mm connector.
A 4-conductor 3.5mm connector has 4 contact points. The contact points are separated by a ring on the connector and each contact point can be used for different signals. For instance, the iPhone's headphones uses a 3.5mm connector with 4 contact points in order to input audio through the headphone's microphone and output stereo audio to the headphones.
Please see our 4-conductor 3.5mm cables and adapters below and remember that each has it's own application.