Dear user, if your device supports the "Multi-control association" function, you can find this option in the device settings page. If you do not find this option, it means your device does not support this function.The multi-control association function means that the device can be controlled by two switches at the same time. For example, you can associate the switch that controls the bedroom light with the switch near your bed, so that you can pass these two switches control the lights in the bedroom at the same time.
Note: this function currently only supports common switches, and currently it does not support scene switches, curtain switches, etc.