Connect through a 3.5 mm audio connection for wired listening on equipment that provides a compatible audio jack. The CODi A04512 combines a noise-cancelling headphone design with no integrated microphone, keeping the device focused on audio playback rather than voice capture. It suits users who need a straightforward personal listening accessory without a boom or inline microphone requirement. Use the headset at desk computers, shared learning stations, media playback systems, or other endpoints where a 3.5 mm audio output is present. Its wired connection creates a direct physical audio link between the listening device and the host endpoint. Before installation, verify that the host exposes a compatible 3.5 mm audio connection and that the intended workflow does not require a microphone. Noise-cancelling capability is the defining listening feature for settings where surrounding sound can interfere with audio. The no-microphone configuration matters in environments that need listening only, such as training content, prerecorded media, or audio monitoring. Select it when the required endpoint connection is 3.5 mm and two-way voice communication is outside the scope of the workstation.