diff --git a/homeassistant/components/unifiprotect/binary_sensor.py b/homeassistant/components/unifiprotect/binary_sensor.py
index da292e805bf..d288fe66e2b 100644
--- a/homeassistant/components/unifiprotect/binary_sensor.py
+++ b/homeassistant/components/unifiprotect/binary_sensor.py
@@ -453,6 +453,7 @@ EVENT_SENSORS: tuple[ProtectBinaryEventEntityDescription, ...] = (
     ProtectBinaryEventEntityDescription(
         key="smart_audio_cmonx",
         translation_key="co_alarm_detected",
+        device_class=BinarySensorDeviceClass.CO,
         ufp_required_field="can_detect_co",
         ufp_enabled="is_co_detection_on",
         ufp_event_obj="last_cmonx_detect_event",
diff --git a/homeassistant/components/unifiprotect/button.py b/homeassistant/components/unifiprotect/button.py
index 942da255a4e..67356fcf862 100644
--- a/homeassistant/components/unifiprotect/button.py
+++ b/homeassistant/components/unifiprotect/button.py
@@ -6,7 +6,7 @@ from collections.abc import Sequence
 from dataclasses import dataclass
 from functools import partial
 import logging
-from typing import TYPE_CHECKING, Final
+from typing import TYPE_CHECKING
 
 from uiprotect.data import ModelType, ProtectAdoptableDeviceModel
 
@@ -45,9 +45,6 @@ class ProtectButtonEntityDescription(
     ufp_press: str | None = None
 
 
-DEVICE_CLASS_CHIME_BUTTON: Final = "unifiprotect__chime_button"
-
-
 ALL_DEVICE_BUTTONS: tuple[ProtectButtonEntityDescription, ...] = (
     ProtectButtonEntityDescription(
         key="reboot",
@@ -84,7 +81,6 @@ CHIME_BUTTONS: tuple[ProtectButtonEntityDescription, ...] = (
     ProtectButtonEntityDescription(
         key="play",
         translation_key="play_chime",
-        device_class=DEVICE_CLASS_CHIME_BUTTON,
         ufp_press="play",
     ),
     ProtectButtonEntityDescription(
diff --git a/homeassistant/components/unifiprotect/services.yaml b/homeassistant/components/unifiprotect/services.yaml
index b620c195fc2..57d32e24993 100644
--- a/homeassistant/components/unifiprotect/services.yaml
+++ b/homeassistant/components/unifiprotect/services.yaml
@@ -29,8 +29,6 @@ set_chime_paired_doorbells:
       selector:
         device:
           integration: unifiprotect
-          entity:
-            device_class: unifiprotect__chime_button
     doorbells:
       example: "binary_sensor.front_doorbell_doorbell"
       required: false