diff --git a/example.py b/example.py
index c0a3d2e..a4a96ec 100644
--- a/example.py
+++ b/example.py
@@ -5,7 +5,10 @@
 import time
 import logging
 
-from ynca import Receiver, Mute, ZONE_SUBUNIT_IDS, Subunit
+from ynca import Receiver, Mute, Subunit
+
+ZONE_SUBUNIT_IDS = [Subunit.MAIN, Subunit.ZONE2, Subunit.ZONE3, Subunit.ZONE4]
+
 
 if __name__ == "__main__":
 
diff --git a/ynca/__init__.py b/ynca/__init__.py
index 2609dd5..5978b2f 100644
--- a/ynca/__init__.py
+++ b/ynca/__init__.py
@@ -2,21 +2,19 @@
 
 from .connection import YncaConnection, YncaConnectionError, ynca_console
 from .constants import (
-    SoundPrg,
+    Avail,
+    Band,
     Mute,
-    Subunit,
-    ZONE_SUBUNIT_IDS,
     Playback,
     PlaybackInfo,
     Repeat,
-    Avail,
+    SoundPrg,
+    Subunit,
 )
 from .receiver import (
+    SUBUNIT_INPUT_MAPPINGS,
     Receiver,
     YncaInitializationFailedException,
-    SUBUNIT_INPUT_MAPPINGS,
 )
 
-from .zone import ZoneBase
-
 logging.getLogger(__name__).addHandler(logging.NullHandler())
diff --git a/ynca/constants.py b/ynca/constants.py
index 301afb6..2940e49 100644
--- a/ynca/constants.py
+++ b/ynca/constants.py
@@ -89,7 +89,3 @@ class Playback(str, Enum):
 class Band(str, Enum):
     AM = "AM"
     FM = "FM"
-
-
-"""Subunits that are zones """
-ZONE_SUBUNIT_IDS = [Subunit.MAIN, Subunit.ZONE2, Subunit.ZONE3, Subunit.ZONE4]