diff --git a/src/enginuity/logger/EcuLogger.java b/src/enginuity/logger/EcuLogger.java
index 342891b9..ebe12a1f 100644
--- a/src/enginuity/logger/EcuLogger.java
+++ b/src/enginuity/logger/EcuLogger.java
@@ -8,6 +8,7 @@ import enginuity.logger.definition.EcuSwitch;
 import enginuity.logger.io.serial.SerialPortRefresher;
 import enginuity.logger.ui.LoggerDataTableModel;
 import enginuity.logger.ui.MessageListener;
+import enginuity.logger.ui.ParameterListTable;
 import enginuity.logger.ui.ParameterListTableModel;
 import enginuity.logger.ui.ParameterRegistrationBroker;
 import enginuity.logger.ui.ParameterRegistrationBrokerImpl;
@@ -168,9 +169,9 @@ public final class EcuLogger extends JFrame implements WindowListener, PropertyC
     }
 
     private JTable buildParamListTable(TableModel tableModel) {
-        JTable paramListTable = new JTable(tableModel);
+        JTable paramListTable = new ParameterListTable(tableModel);
         changeColumnWidth(paramListTable, 0, 20, 55, 55);
-        changeColumnWidth(paramListTable, 2, 50, 60, 60);
+        changeColumnWidth(paramListTable, 2, 50, 250, 80);
         return paramListTable;
     }
 
diff --git a/src/enginuity/logger/definition/EcuData.java b/src/enginuity/logger/definition/EcuData.java
index 62998daf..caa6a35d 100644
--- a/src/enginuity/logger/definition/EcuData.java
+++ b/src/enginuity/logger/definition/EcuData.java
@@ -14,7 +14,7 @@ public interface EcuData {
 
     EcuDataConvertor[] getConvertors();
 
-    void selectConvertor(int index);
+    void selectConvertor(EcuDataConvertor convertor);
 
     EcuDataType getDataType();
 
diff --git a/src/enginuity/logger/definition/EcuDerivedParameterConvertorImpl.java b/src/enginuity/logger/definition/EcuDerivedParameterConvertorImpl.java
index ed9f07d5..dc82a90a 100644
--- a/src/enginuity/logger/definition/EcuDerivedParameterConvertorImpl.java
+++ b/src/enginuity/logger/definition/EcuDerivedParameterConvertorImpl.java
@@ -50,4 +50,8 @@ public final class EcuDerivedParameterConvertorImpl implements EcuDerivedParamet
         checkNotNullOrEmpty(ecuDatas, "ecuDatas");
         this.ecuDatas = ecuDatas;
     }
+
+    public String toString() {
+        return getUnits();
+    }
 }
diff --git a/src/enginuity/logger/definition/EcuDerivedParameterImpl.java b/src/enginuity/logger/definition/EcuDerivedParameterImpl.java
index 53a32ae1..e11f15a8 100644
--- a/src/enginuity/logger/definition/EcuDerivedParameterImpl.java
+++ b/src/enginuity/logger/definition/EcuDerivedParameterImpl.java
@@ -50,13 +50,12 @@ public final class EcuDerivedParameterImpl implements EcuParameter {
         return convertors;
     }
 
-    public void selectConvertor(int index) {
-        if (index < 0) {
-            selectedConvertorIndex = 0;
-        } else if (index >= convertors.length) {
-            selectedConvertorIndex = convertors.length - 1;
-        } else {
-            selectedConvertorIndex = index;
+    public void selectConvertor(EcuDataConvertor convertor) {
+        for (int i = 0; i < convertors.length; i++) {
+            EcuDerivedParameterConvertor parameterConvertor = convertors[i];
+            if (convertor == parameterConvertor) {
+                selectedConvertorIndex = i;
+            }
         }
     }
 
diff --git a/src/enginuity/logger/definition/EcuParameterConvertorImpl.java b/src/enginuity/logger/definition/EcuParameterConvertorImpl.java
index 6fb44d10..4d9d6f34 100644
--- a/src/enginuity/logger/definition/EcuParameterConvertorImpl.java
+++ b/src/enginuity/logger/definition/EcuParameterConvertorImpl.java
@@ -34,4 +34,8 @@ public final class EcuParameterConvertorImpl implements EcuDataConvertor {
         return format.format(value);
     }
 
+    public String toString() {
+        return getUnits();
+    }
+
 }
diff --git a/src/enginuity/logger/definition/EcuParameterImpl.java b/src/enginuity/logger/definition/EcuParameterImpl.java
index 7417ff1b..aafc3829 100644
--- a/src/enginuity/logger/definition/EcuParameterImpl.java
+++ b/src/enginuity/logger/definition/EcuParameterImpl.java
@@ -49,13 +49,12 @@ public final class EcuParameterImpl implements EcuParameter {
         return convertors;
     }
 
-    public void selectConvertor(int index) {
-        if (index < 0) {
-            selectedConvertorIndex = 0;
-        } else if (index >= convertors.length) {
-            selectedConvertorIndex = convertors.length - 1;
-        } else {
-            selectedConvertorIndex = index;
+    public void selectConvertor(EcuDataConvertor convertor) {
+        for (int i = 0; i < convertors.length; i++) {
+            EcuDataConvertor dataConvertor = convertors[i];
+            if (convertor == dataConvertor) {
+                selectedConvertorIndex = i;
+            }
         }
     }
 
diff --git a/src/enginuity/logger/definition/EcuSwitchConvertorImpl.java b/src/enginuity/logger/definition/EcuSwitchConvertorImpl.java
index 5cbf7183..7268e96d 100644
--- a/src/enginuity/logger/definition/EcuSwitchConvertorImpl.java
+++ b/src/enginuity/logger/definition/EcuSwitchConvertorImpl.java
@@ -21,6 +21,10 @@ public final class EcuSwitchConvertorImpl implements EcuDataConvertor {
         return value > 0 ? "1" : "0";
     }
 
+    public String toString() {
+        return getUnits();
+    }
+
     private void checkBit(int bit) {
         if (bit < 0 || bit > 7) {
             throw new IllegalArgumentException("Bit must be between 0 and 7 inclusive.");
diff --git a/src/enginuity/logger/definition/EcuSwitchImpl.java b/src/enginuity/logger/definition/EcuSwitchImpl.java
index fe258dd4..12f4d5c9 100644
--- a/src/enginuity/logger/definition/EcuSwitchImpl.java
+++ b/src/enginuity/logger/definition/EcuSwitchImpl.java
@@ -51,13 +51,12 @@ public final class EcuSwitchImpl implements EcuSwitch {
         return convertors;
     }
 
-    public void selectConvertor(int index) {
-        if (index < 0) {
-            selectedConvertorIndex = 0;
-        } else if (index >= convertors.length) {
-            selectedConvertorIndex = convertors.length - 1;
-        } else {
-            selectedConvertorIndex = index;
+    public void selectConvertor(EcuDataConvertor convertor) {
+        for (int i = 0; i < convertors.length; i++) {
+            EcuDataConvertor dataConvertor = convertors[i];
+            if (convertor == dataConvertor) {
+                selectedConvertorIndex = i;
+            }
         }
     }
 
diff --git a/src/enginuity/logger/ui/ParameterListTable.java b/src/enginuity/logger/ui/ParameterListTable.java
new file mode 100644
index 00000000..f1e4cd9a
--- /dev/null
+++ b/src/enginuity/logger/ui/ParameterListTable.java
@@ -0,0 +1,36 @@
+package enginuity.logger.ui;
+
+import enginuity.logger.definition.EcuData;
+
+import javax.swing.*;
+import javax.swing.table.TableCellEditor;
+import javax.swing.table.TableCellRenderer;
+import javax.swing.table.TableModel;
+
+public final class ParameterListTable extends JTable {
+    private UnitsComboBoxEditor comboBoxEditor = new UnitsComboBoxEditor();
+    private UnitsComboBoxRenderer comboBoxRenderer = new UnitsComboBoxRenderer();
+
+    public ParameterListTable(TableModel tableModel) {
+        super(tableModel);
+    }
+
+    public TableCellRenderer getCellRenderer(int row, int col) {
+        return displayComboBox(row, col) ? comboBoxRenderer : super.getCellRenderer(row, col);
+    }
+
+    public TableCellEditor getCellEditor(int row, int col) {
+        return displayComboBox(row, col) ? comboBoxEditor : super.getCellEditor(row, col);
+    }
+
+    private boolean displayComboBox(int row, int col) {
+        Object value = getValueAt(row, col);
+        if (EcuData.class.isAssignableFrom(value.getClass())) {
+            EcuData ecuData = (EcuData) value;
+            if (ecuData.getConvertors().length > 1) {
+                return true;
+            }
+        }
+        return false;
+    }
+}
diff --git a/src/enginuity/logger/ui/ParameterListTableModel.java b/src/enginuity/logger/ui/ParameterListTableModel.java
index 0580d8c5..7e9bb65a 100644
--- a/src/enginuity/logger/ui/ParameterListTableModel.java
+++ b/src/enginuity/logger/ui/ParameterListTableModel.java
@@ -45,7 +45,8 @@ public final class ParameterListTableModel extends AbstractTableModel {
             case 1:
                 return paramRow.getEcuData().getName();
             case 2:
-                return paramRow.getEcuData().getSelectedConvertor().getUnits();
+                EcuData ecuData = paramRow.getEcuData();
+                return ecuData.getConvertors().length > 1 ? ecuData : ecuData.getSelectedConvertor().getUnits();
             default:
                 return "Error!";
         }
diff --git a/src/enginuity/logger/ui/UnitsComboBoxEditor.java b/src/enginuity/logger/ui/UnitsComboBoxEditor.java
new file mode 100644
index 00000000..c1a470cb
--- /dev/null
+++ b/src/enginuity/logger/ui/UnitsComboBoxEditor.java
@@ -0,0 +1,45 @@
+package enginuity.logger.ui;
+
+import enginuity.logger.definition.EcuData;
+import enginuity.logger.definition.EcuDataConvertor;
+
+import javax.swing.*;
+import javax.swing.table.TableCellEditor;
+import java.awt.*;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+
+public final class UnitsComboBoxEditor extends AbstractCellEditor implements TableCellEditor, ActionListener {
+    private static final String EDIT_COMMAND = "EDIT";
+    private EcuData currentEcuData;
+
+    public Object getCellEditorValue() {
+        return currentEcuData.getSelectedConvertor();
+    }
+
+    public Component getTableCellEditorComponent(JTable table, Object ecuData, boolean isSelected, int row, int column) {
+        currentEcuData = (EcuData) ecuData;
+        EcuDataConvertor[] convertors = currentEcuData.getConvertors();
+        JComboBox comboBox = new JComboBox();
+        for (EcuDataConvertor convertor : convertors) {
+            comboBox.addItem(convertor);
+        }
+        comboBox.setSelectedItem(currentEcuData.getSelectedConvertor());
+        comboBox.setEditable(false);
+        comboBox.setEnabled(true);
+        comboBox.setActionCommand(EDIT_COMMAND);
+        comboBox.addActionListener(this);
+        return comboBox;
+    }
+
+    public void actionPerformed(ActionEvent actionEvent) {
+        if (EDIT_COMMAND.equals(actionEvent.getActionCommand())) {
+            Object source = actionEvent.getSource();
+            if (source != null && JComboBox.class.isAssignableFrom(source.getClass())) {
+                JComboBox comboBox = (JComboBox) source;
+                currentEcuData.selectConvertor((EcuDataConvertor) comboBox.getSelectedItem());
+                fireEditingStopped();
+            }
+        }
+    }
+}
diff --git a/src/enginuity/logger/ui/UnitsComboBoxRenderer.java b/src/enginuity/logger/ui/UnitsComboBoxRenderer.java
new file mode 100644
index 00000000..58023615
--- /dev/null
+++ b/src/enginuity/logger/ui/UnitsComboBoxRenderer.java
@@ -0,0 +1,22 @@
+package enginuity.logger.ui;
+
+import enginuity.logger.definition.EcuData;
+import enginuity.logger.definition.EcuDataConvertor;
+
+import javax.swing.*;
+import javax.swing.table.TableCellRenderer;
+import java.awt.*;
+
+public final class UnitsComboBoxRenderer extends JComboBox implements TableCellRenderer {
+
+    public Component getTableCellRendererComponent(JTable table, Object ecuData, boolean isSelected, boolean hasFocus, int row, int column) {
+        EcuData currentEcuData = (EcuData) ecuData;
+        EcuDataConvertor[] convertors = currentEcuData.getConvertors();
+        JComboBox comboBox = new JComboBox();
+        for (EcuDataConvertor convertor : convertors) {
+            comboBox.addItem(convertor);
+        }
+        comboBox.setSelectedItem(currentEcuData.getSelectedConvertor());
+        return comboBox;
+    }
+}