The AT8687 kit is used to link one ATW-CHG3/ATW-CHG3N charging station to another, allowing all stations (both ATW-CHG3N and ATW-CHG3) to be powered by a single source and be monitored through the dedicated Audio-Technica app or third-party software. Kit includes link cable, link plate, and four plate screws. 
 
Link Kit compatible with ATW-CHG3
Link Kit compatible with ATW-CHG3N
Supplied with four fixing screws and a link cable