diff --git a/gui/connection_tab.py b/gui/connection_tab.py
index 847789a..7f3a4f2 100644
--- a/gui/connection_tab.py
+++ b/gui/connection_tab.py
@@ -113,12 +113,12 @@ class ConnectionRow(QWidget):
         file_l.addWidget(browse_btn)
         file_l.addWidget(QLabel("Delay:"))
         self._delay_spin = QDoubleSpinBox()
-        self._delay_spin.setRange(0.0, 10.0)
-        self._delay_spin.setSingleStep(0.1)
-        self._delay_spin.setDecimals(1)
-        self._delay_spin.setValue(1.0)
+        self._delay_spin.setRange(0.0, 1.0)
+        self._delay_spin.setSingleStep(0.01)
+        self._delay_spin.setDecimals(2)
+        self._delay_spin.setValue(0.0)
         self._delay_spin.setSuffix(" s")
-        self._delay_spin.setFixedWidth(72)
+        self._delay_spin.setFixedWidth(84)
         file_l.addWidget(self._delay_spin)
         self._stack.addWidget(file_w)
 
@@ -189,7 +189,7 @@ class ConnectionRow(QWidget):
             serial_port = self._ser_combo.currentText().strip(),
             baud_rate   = int(self._baud_combo.currentText()),
             file_path   = self._file_edit.text().strip(),
-            delay       = self._delay_spin.value(),
+            delay       = max(0.0001, self._delay_spin.value()),
         )
 
     def get_receiver_id(self) -> str: