diff --git a/homeassistant/components/xiaomi_miio/number.py b/homeassistant/components/xiaomi_miio/number.py
index 364bd59772c..2d3106ddd4e 100644
--- a/homeassistant/components/xiaomi_miio/number.py
+++ b/homeassistant/components/xiaomi_miio/number.py
@@ -4,6 +4,8 @@ from __future__ import annotations
 import dataclasses
 from dataclasses import dataclass
 
+from miio import Device
+
 from homeassistant.components.number import NumberEntity, NumberEntityDescription
 from homeassistant.components.number.const import DOMAIN as PLATFORM_DOMAIN
 from homeassistant.config_entries import ConfigEntry
@@ -12,6 +14,7 @@ from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers import entity_registry as er
 from homeassistant.helpers.entity import EntityCategory
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
+from homeassistant.helpers.update_coordinator import DataUpdateCoordinator
 
 from .const import (
     CONF_DEVICE,
@@ -91,11 +94,17 @@ ATTR_VOLUME = "volume"
 
 
 @dataclass
-class XiaomiMiioNumberDescription(NumberEntityDescription):
+class XiaomiMiioNumberMixin:
+    """A class that describes number entities."""
+
+    method: str
+
+
+@dataclass
+class XiaomiMiioNumberDescription(NumberEntityDescription, XiaomiMiioNumberMixin):
     """A class that describes number entities."""
 
     available_with_device_off: bool = True
-    method: str | None = None
 
 
 @dataclass
@@ -325,7 +334,16 @@ async def async_setup_entry(
 class XiaomiNumberEntity(XiaomiCoordinatedMiioEntity, NumberEntity):
     """Representation of a generic Xiaomi attribute selector."""
 
-    def __init__(self, device, entry, unique_id, coordinator, description):
+    entity_description: XiaomiMiioNumberDescription
+
+    def __init__(
+        self,
+        device: Device,
+        entry: ConfigEntry,
+        unique_id: str,
+        coordinator: DataUpdateCoordinator,
+        description: XiaomiMiioNumberDescription,
+    ) -> None:
         """Initialize the generic Xiaomi attribute selector."""
         super().__init__(device, entry, unique_id, coordinator)
 
@@ -335,7 +353,7 @@ class XiaomiNumberEntity(XiaomiCoordinatedMiioEntity, NumberEntity):
         self.entity_description = description
 
     @property
-    def available(self):
+    def available(self) -> bool:
         """Return the number controller availability."""
         if (
             super().available
@@ -345,7 +363,7 @@ class XiaomiNumberEntity(XiaomiCoordinatedMiioEntity, NumberEntity):
             return False
         return super().available
 
-    async def async_set_native_value(self, value):
+    async def async_set_native_value(self, value: float) -> None:
         """Set an option of the miio device."""
         method = getattr(self, self.entity_description.method)
         if await method(int(value)):
@@ -353,7 +371,7 @@ class XiaomiNumberEntity(XiaomiCoordinatedMiioEntity, NumberEntity):
             self.async_write_ha_state()
 
     @callback
-    def _handle_coordinator_update(self):
+    def _handle_coordinator_update(self) -> None:
         """Fetch state from the device."""
         # On state change the device doesn't provide the new state immediately.
         self._attr_native_value = self._extract_value_from_attribute(
@@ -407,7 +425,7 @@ class XiaomiNumberEntity(XiaomiCoordinatedMiioEntity, NumberEntity):
             delay_off_countdown * 60,
         )
 
-    async def async_set_led_brightness_level(self, level: int):
+    async def async_set_led_brightness_level(self, level: int) -> bool:
         """Set the led brightness level."""
         return await self._try_command(
             "Setting the led brightness level of the miio device failed.",
@@ -415,7 +433,7 @@ class XiaomiNumberEntity(XiaomiCoordinatedMiioEntity, NumberEntity):
             level,
         )
 
-    async def async_set_led_brightness(self, level: int):
+    async def async_set_led_brightness(self, level: int) -> bool:
         """Set the led brightness level."""
         return await self._try_command(
             "Setting the led brightness level of the miio device failed.",
@@ -423,7 +441,7 @@ class XiaomiNumberEntity(XiaomiCoordinatedMiioEntity, NumberEntity):
             level,
         )
 
-    async def async_set_favorite_rpm(self, rpm: int):
+    async def async_set_favorite_rpm(self, rpm: int) -> bool:
         """Set the target motor speed."""
         return await self._try_command(
             "Setting the favorite rpm of the miio device failed.",