diff --git a/python/set_devices/qt_ports/port_selection.py b/python/set_devices/qt_ports/port_selection.py
new file mode 100644
index 0000000..e8516c0
--- /dev/null
+++ b/python/set_devices/qt_ports/port_selection.py
@@ -0,0 +1,23 @@
+"""Shared serial-port labels and selection for Qt project interfaces."""
+
+
+def port_label(name: str, description: str = "") -> str:
+    """Display the device description without changing the transport name."""
+    description = (description or "").strip()
+    return f"{name} · {description}" if description else name
+
+
+def selected_port_name(combo) -> str:
+    """Read item data, while allowing a manually entered port name."""
+    if combo.isEditable() and combo.currentText() != combo.itemText(combo.currentIndex()):
+        return combo.currentText().strip()
+    return str(combo.currentData() or combo.currentText()).strip()
+
+
+def select_port_name(combo, name: str) -> None:
+    """Restore by transport name; retain manually entered or absent ports."""
+    index = combo.findData(name)
+    if index >= 0:
+        combo.setCurrentIndex(index)
+    elif combo.isEditable():
+        combo.setEditText(name)