Link Kit for ATW-CHG3 https://www.audio-technica.com/fr-fr/catalog/product/view/id/5349/s/at8687/category/1090/
AT8687 Link Kit for ATW-CHG3 – Link Kit compatible with ATW-CHG3 and ATW-CHG3N and Supplied with four fixing screws and a link cable
through the dedicated Audio-Technica app or third-party software