10-4202 is a screw terminal, stereo/mono audio jack manufactured by GC Electronics. It features a 3-position switch that can be set to Stereo, Mono, or Off, allowing for different audio output configurations. It also includes two solder lugs, allowing for wiring flexibility, and is designed for secure mounting in a panel. The device is ideal for use in a variety of audio applications, including audio systems, video systems, amplifiers, and other audio-related projects.