diff --git a/MainCode/adalm1000_logger.py b/MainCode/adalm1000_logger.py
index a19e608..6388e47 100644
--- a/MainCode/adalm1000_logger.py
+++ b/MainCode/adalm1000_logger.py
@@ -482,18 +482,19 @@ class BatteryTester(QMainWindow):
         self.main_layout = QVBoxLayout(self.central_widget)
         self.main_layout.setContentsMargins(10, 10, 10, 10)
         
-        # Mode selection
+        # Mode and device selection
         mode_frame = QFrame()
         mode_frame.setFrameShape(QFrame.StyledPanel)
         mode_frame.setStyleSheet(f"QFrame {{ border: 1px solid {self.accent_color}; border-radius: 5px; }}")
         mode_layout = QHBoxLayout(mode_frame)
         
+        # Test mode selection
         self.mode_label = QLabel("Test Mode:")
         self.mode_label.setStyleSheet(f"color: {self.fg_color};")
         mode_layout.addWidget(self.mode_label)
 
         self.mode_combo = QComboBox()
-        self.mode_combo.addItems(["Live Monitoring", "Discharge Test", "Charge Test", "Cycle Test"])  # Added Charge Test
+        self.mode_combo.addItems(["Live Monitoring", "Discharge Test", "Charge Test", "Cycle Test"])
         self.mode_combo.setStyleSheet(f"""
             QComboBox {{
                 background-color: #3B4252;
@@ -506,6 +507,24 @@ class BatteryTester(QMainWindow):
         self.mode_combo.currentTextChanged.connect(self.change_mode)
         mode_layout.addWidget(self.mode_combo, 1)
         
+        # Device selection
+        self.device_label = QLabel("ADALM1000 Device:")
+        self.device_label.setStyleSheet(f"color: {self.fg_color};")
+        mode_layout.addWidget(self.device_label)
+
+        self.device_combo = QComboBox()
+        self.device_combo.setStyleSheet(f"""
+            QComboBox {{
+                background-color: #3B4252;
+                color: {self.fg_color};
+                border: 1px solid #4C566A;
+                border-radius: 3px;
+                padding: 2px;
+            }}
+        """)
+        self.device_combo.currentIndexChanged.connect(self.change_device)
+        mode_layout.addWidget(self.device_combo, 1)
+        
         self.main_layout.addWidget(mode_frame)
         
         # Header area