diff --git a/homeassistant/components/mutesync/binary_sensor.py b/homeassistant/components/mutesync/binary_sensor.py
index 444643d5333acb..910f91fc4c60fc 100644
--- a/homeassistant/components/mutesync/binary_sensor.py
+++ b/homeassistant/components/mutesync/binary_sensor.py
@@ -36,24 +36,17 @@ def __init__(self, coordinator, sensor_type):
         super().__init__(coordinator)
         self._sensor_type = sensor_type
         self._attr_translation_key = sensor_type
-
-    @property
-    def unique_id(self):
-        """Return the unique ID of the sensor."""
-        return f"{self.coordinator.data['user-id']}-{self._sensor_type}"
-
-    @property
-    def is_on(self):
-        """Return the state of the sensor."""
-        return self.coordinator.data[self._sensor_type]
-
-    @property
-    def device_info(self) -> DeviceInfo:
-        """Return the device info of the sensor."""
-        return DeviceInfo(
+        user_id = coordinator.data["user-id"]
+        self._attr_unique_id = f"{user_id}-{sensor_type}"
+        self._attr_device_info = DeviceInfo(
             entry_type=DeviceEntryType.SERVICE,
-            identifiers={(DOMAIN, self.coordinator.data["user-id"])},
+            identifiers={(DOMAIN, user_id)},
             manufacturer="mütesync",
             model="mutesync app",
             name="mutesync",
         )
+
+    @property
+    def is_on(self):
+        """Return the state of the sensor."""
+        return self.coordinator.data[self._sensor_type]