diff --git a/crosspoint_reader/config.py b/crosspoint_reader/config.py
index 6e3e241..8a0408a 100644
--- a/crosspoint_reader/config.py
+++ b/crosspoint_reader/config.py
@@ -5,6 +5,7 @@
     QDialogButtonBox,
     QFormLayout,
     QHBoxLayout,
+    QLabel,
     QLineEdit,
     QPlainTextEdit,
     QPushButton,
@@ -47,6 +48,12 @@ def __init__(self):
 
         layout.addRow('Host', self.host)
         layout.addRow('Port', self.port)
+
+        notice = QLabel('Host and port settings are fallback values used only when the device is not auto-discoverable by UDP broadcast.')
+        notice.setWordWrap(True)
+        notice.setStyleSheet('color: gray; font-style: italic;')
+        layout.addRow('', notice)
+
         layout.addRow('Upload path', self.path)
         layout.addRow('Chunk size', self.chunk_size)
         layout.addRow('', self.debug)