diff --git a/homeassistant/components/lametric/button.py b/homeassistant/components/lametric/button.py
index 18a0c2f8f72..1de8c1d1717 100644
--- a/homeassistant/components/lametric/button.py
+++ b/homeassistant/components/lametric/button.py
@@ -19,20 +19,13 @@ from .entity import LaMetricEntity
 from .helpers import lametric_exception_handler
 
 
-@dataclass
-class LaMetricButtonEntityDescriptionMixin:
-    """Mixin values for LaMetric entities."""
+@dataclass(kw_only=True)
+class LaMetricButtonEntityDescription(ButtonEntityDescription):
+    """Class describing LaMetric button entities."""
 
     press_fn: Callable[[LaMetricDevice], Awaitable[Any]]
 
 
-@dataclass
-class LaMetricButtonEntityDescription(
-    ButtonEntityDescription, LaMetricButtonEntityDescriptionMixin
-):
-    """Class describing LaMetric button entities."""
-
-
 BUTTONS = [
     LaMetricButtonEntityDescription(
         key="app_next",
diff --git a/homeassistant/components/lametric/number.py b/homeassistant/components/lametric/number.py
index da458cab61e..d8c70494264 100644
--- a/homeassistant/components/lametric/number.py
+++ b/homeassistant/components/lametric/number.py
@@ -19,21 +19,14 @@ from .entity import LaMetricEntity
 from .helpers import lametric_exception_handler
 
 
-@dataclass
-class LaMetricEntityDescriptionMixin:
-    """Mixin values for LaMetric entities."""
+@dataclass(kw_only=True)
+class LaMetricNumberEntityDescription(NumberEntityDescription):
+    """Class describing LaMetric number entities."""
 
     value_fn: Callable[[Device], int | None]
     set_value_fn: Callable[[LaMetricDevice, float], Awaitable[Any]]
 
 
-@dataclass
-class LaMetricNumberEntityDescription(
-    NumberEntityDescription, LaMetricEntityDescriptionMixin
-):
-    """Class describing LaMetric number entities."""
-
-
 NUMBERS = [
     LaMetricNumberEntityDescription(
         key="brightness",
diff --git a/homeassistant/components/lametric/select.py b/homeassistant/components/lametric/select.py
index b7c0e55745e..f15147235ac 100644
--- a/homeassistant/components/lametric/select.py
+++ b/homeassistant/components/lametric/select.py
@@ -19,21 +19,14 @@ from .entity import LaMetricEntity
 from .helpers import lametric_exception_handler
 
 
-@dataclass
-class LaMetricEntityDescriptionMixin:
-    """Mixin values for LaMetric entities."""
+@dataclass(kw_only=True)
+class LaMetricSelectEntityDescription(SelectEntityDescription):
+    """Class describing LaMetric select entities."""
 
     current_fn: Callable[[Device], str]
     select_fn: Callable[[LaMetricDevice, str], Awaitable[Any]]
 
 
-@dataclass
-class LaMetricSelectEntityDescription(
-    SelectEntityDescription, LaMetricEntityDescriptionMixin
-):
-    """Class describing LaMetric select entities."""
-
-
 SELECTS = [
     LaMetricSelectEntityDescription(
         key="brightness_mode",
diff --git a/homeassistant/components/lametric/sensor.py b/homeassistant/components/lametric/sensor.py
index 6cddf81b2bf..88d461e9d4f 100644
--- a/homeassistant/components/lametric/sensor.py
+++ b/homeassistant/components/lametric/sensor.py
@@ -21,20 +21,13 @@ from .coordinator import LaMetricDataUpdateCoordinator
 from .entity import LaMetricEntity
 
 
-@dataclass
-class LaMetricEntityDescriptionMixin:
-    """Mixin values for LaMetric entities."""
+@dataclass(kw_only=True)
+class LaMetricSensorEntityDescription(SensorEntityDescription):
+    """Class describing LaMetric sensor entities."""
 
     value_fn: Callable[[Device], int | None]
 
 
-@dataclass
-class LaMetricSensorEntityDescription(
-    SensorEntityDescription, LaMetricEntityDescriptionMixin
-):
-    """Class describing LaMetric sensor entities."""
-
-
 SENSORS = [
     LaMetricSensorEntityDescription(
         key="rssi",
diff --git a/homeassistant/components/lametric/switch.py b/homeassistant/components/lametric/switch.py
index c33ec16d617..ace492fe0cb 100644
--- a/homeassistant/components/lametric/switch.py
+++ b/homeassistant/components/lametric/switch.py
@@ -19,21 +19,13 @@ from .entity import LaMetricEntity
 from .helpers import lametric_exception_handler
 
 
-@dataclass
-class LaMetricEntityDescriptionMixin:
-    """Mixin values for LaMetric entities."""
-
-    is_on_fn: Callable[[Device], bool]
-    set_fn: Callable[[LaMetricDevice, bool], Awaitable[Any]]
-
-
-@dataclass
-class LaMetricSwitchEntityDescription(
-    SwitchEntityDescription, LaMetricEntityDescriptionMixin
-):
+@dataclass(kw_only=True)
+class LaMetricSwitchEntityDescription(SwitchEntityDescription):
     """Class describing LaMetric switch entities."""
 
     available_fn: Callable[[Device], bool] = lambda device: True
+    is_on_fn: Callable[[Device], bool]
+    set_fn: Callable[[LaMetricDevice, bool], Awaitable[Any]]
 
 
 SWITCHES = [