diff --git a/lib/logitech_receiver/base.py b/lib/logitech_receiver/base.py
index 0aad72e0..23e64240 100644
--- a/lib/logitech_receiver/base.py
+++ b/lib/logitech_receiver/base.py
@@ -27,6 +27,7 @@ import threading
 from contextlib import contextmanager
 from random import getrandbits
 from time import time
+from typing import Any
 
 import hidapi
 
@@ -56,34 +57,41 @@ class HIDPPNotification:
         return f"Notification({self.report_id:02x},{self.devnumber},{self.sub_id:02X},{self.address:02X},{text_as_hex})"
 
 
-def _wired_device(product_id, interface):
-    return {"vendor_id": 1133, "product_id": product_id, "bus_id": 3, "usb_interface": interface, "isDevice": True}
+def _usb_device(product_id: int, usb_interface: int) -> dict[str, Any]:
+    return {
+        "vendor_id": 1133,
+        "product_id": product_id,
+        "bus_id": 3,
+        "usb_interface": usb_interface,
+        "isDevice": True,
+    }
 
 
-def _bt_device(product_id):
+def _bluetooth_device(product_id: int) -> dict[str, Any]:
     return {"vendor_id": 1133, "product_id": product_id, "bus_id": 5, "isDevice": True}
 
 
-DEVICE_IDS = []
+KNOWN_DEVICE_IDS = []
 
 for _ignore, d in descriptors.DEVICES.items():
     if d.usbid:
-        DEVICE_IDS.append(_wired_device(d.usbid, d.interface if d.interface else 2))
+        usb_interface = d.interface if d.interface else 2
+        KNOWN_DEVICE_IDS.append(_usb_device(d.usbid, usb_interface))
     if d.btid:
-        DEVICE_IDS.append(_bt_device(d.btid))
+        KNOWN_DEVICE_IDS.append(_bluetooth_device(d.btid))
 
 
-def other_device_check(bus_id, vendor_id, product_id):
+def other_device_check(bus_id: int, vendor_id: int, product_id: int):
     """Check whether product is a Logitech USB-connected or Bluetooth device based on bus, vendor, and product IDs
     This allows Solaar to support receiverless HID++ 2.0 devices that it knows nothing about"""
     if vendor_id != 0x46D:  # Logitech
         return
     if bus_id == 0x3:  # USB
         if product_id >= 0xC07D and product_id <= 0xC094 or product_id >= 0xC32B and product_id <= 0xC344:
-            return _wired_device(product_id, 2)
+            return _usb_device(product_id, 2)
     elif bus_id == 0x5:  # Bluetooth
         if product_id >= 0xB012 and product_id <= 0xB0FF or product_id >= 0xB317 and product_id <= 0xB3FF:
-            return _bt_device(product_id)
+            return _bluetooth_device(product_id)
 
 
 def product_information(usb_id: int | str) -> dict:
@@ -149,7 +157,7 @@ def filter(bus_id, vendor_id, product_id, hidpp_short=False, hidpp_long=False):
     record = filter_receivers(bus_id, vendor_id, product_id, hidpp_short, hidpp_long)
     if record:  # known or unknown receiver
         return record
-    for record in DEVICE_IDS:  # known devices
+    for record in KNOWN_DEVICE_IDS:
         if match(record, bus_id, vendor_id, product_id):
             return record
     if hidpp_short or hidpp_long:  # unknown devices that use HID++
@@ -340,7 +348,7 @@ def _skip_incoming(handle, ihandle, notifications_hook):
 
 def make_notification(report_id, devnumber, data) -> HIDPPNotification | None:
     """Guess if this is a notification (and not just a request reply), and
-    return a Notification tuple if it is."""
+    return a Notification if it is."""
 
     sub_id = ord(data[:1])
     if sub_id & 0x80 == 0x80: