diff --git a/custom_components/gree/climate.py b/custom_components/gree/climate.py
index 539373e..f3a00a3 100644
--- a/custom_components/gree/climate.py
+++ b/custom_components/gree/climate.py
@@ -759,7 +759,7 @@ def unique_id(self):
     def device_info(self) -> DeviceInfo:
         """Return device information."""
         return DeviceInfo(
-            identifiers={(DOMAIN, self._mac_addr)},
+            identifiers={(DOMAIN, self._sub_mac_addr)},
             name=self._name,
             manufacturer="Gree",
         )
diff --git a/custom_components/gree/entity.py b/custom_components/gree/entity.py
index e0f6968..3288f57 100644
--- a/custom_components/gree/entity.py
+++ b/custom_components/gree/entity.py
@@ -59,16 +59,16 @@ def _set_id(self) -> None:
             elif self.entity_description.icon is not None:
                 self._attr_icon = self.entity_description.icon
 
-            self._attr_unique_id = f"{self._device._mac_addr}_{self.entity_description.key}"
+            self._attr_unique_id = f"{self._device._sub_mac_addr}_{self.entity_description.key}"
 
     @property
     def device_info(self) -> DeviceInfo:
         """Return device information."""
         return DeviceInfo(
-            identifiers={(DOMAIN, self._device._mac_addr)},
+            identifiers={(DOMAIN, self._device._sub_mac_addr)},
             name=self._device._name,
             manufacturer="Gree",
-            connections={(CONNECTION_NETWORK_MAC, self._device._mac_addr)},
+            connections={(CONNECTION_NETWORK_MAC, self._device._sub_mac_addr)},
         )
 
     @property