There's a known issue where the plastic piece around one of the ear pieces is missing. Despite this, it still offers reliable audio performance with its TA4F connector.

To use this headset microphone, simply connect it to your device via the TA4F connector. It should start working right away. Remember, the plastic piece around one of the ear pieces is missing, so handle it carefully to avoid further damage. For maintenance, keep it in a dry place and clean the microphone gently with a soft cloth. Don't expose it to extreme temperatures or moisture.