diff --git a/README.md b/README.md
index 7194b25..27f4d38 100644
--- a/README.md
+++ b/README.md
@@ -101,6 +101,8 @@ The commands are interpreted independent of the service id.
 
 * <Relais name> on/off/trigger
 * <Power name> on/off
+* VOLTAGE1 <value>
+* VOLTAGE2 <value>
 
 ## Installation
 
@@ -138,6 +140,10 @@ Github Sponsors:
 
 ## Changes
 
+v0.0.8:
+
+* added DLT injection for setting voltage
+
 v0.0.7:
 
 * support new Relais Board Wemos D1 + 4 Relais shield
diff --git a/dialog.cpp b/dialog.cpp
index d0b2d75..297a873 100644
--- a/dialog.cpp
+++ b/dialog.cpp
@@ -837,7 +837,17 @@ void Dialog::injection(QString text)
 
     qDebug() << "Injection received: " << text;
 
-    if(dltRelais1.getRelaisName(1) == list[0])
+    if(list[0]=="VOLTAGE1")
+    {
+        float value = list[1].toFloat();
+        dltMultimeter1.setVoltage(value);
+    }
+    else if(list[0]=="VOLTAGE2")
+    {
+        float value = list[1].toFloat();
+        dltMultimeter2.setVoltage(value);
+    }
+    else if(dltRelais1.getRelaisName(1) == list[0])
     {
         if(list[1]=="on")
         {
diff --git a/dialog.ui b/dialog.ui
index 094371b..9c5f477 100644
--- a/dialog.ui
+++ b/dialog.ui
@@ -6,8 +6,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>906</width>
-    <height>788</height>
+    <width>922</width>
+    <height>723</height>
    </rect>
   </property>
   <property name="sizePolicy">
@@ -84,21 +84,18 @@
            <string>Value</string>
           </property>
           <layout class="QGridLayout" name="gridLayout_4">
-           <item row="0" column="0">
-            <widget class="QLineEdit" name="lineEditValueV1">
+           <item row="1" column="0">
+            <widget class="QLineEdit" name="lineEditValueA1">
              <property name="font">
               <font>
                <family>Arial</family>
                <pointsize>16</pointsize>
               </font>
              </property>
-             <property name="readOnly">
-              <bool>true</bool>
-             </property>
             </widget>
            </item>
-           <item row="0" column="1">
-            <widget class="QLineEdit" name="lineEditUnitV1">
+           <item row="0" column="0">
+            <widget class="QLineEdit" name="lineEditValueV1">
              <property name="font">
               <font>
                <family>Arial</family>
@@ -110,14 +107,17 @@
              </property>
             </widget>
            </item>
-           <item row="1" column="0">
-            <widget class="QLineEdit" name="lineEditValueA1">
+           <item row="0" column="1">
+            <widget class="QLineEdit" name="lineEditUnitV1">
              <property name="font">
               <font>
                <family>Arial</family>
                <pointsize>16</pointsize>
               </font>
              </property>
+             <property name="readOnly">
+              <bool>true</bool>
+             </property>
             </widget>
            </item>
            <item row="1" column="1">
diff --git a/dltmultimeter.cpp b/dltmultimeter.cpp
index 12504c2..d252558 100644
--- a/dltmultimeter.cpp
+++ b/dltmultimeter.cpp
@@ -430,6 +430,8 @@ void DLTMultimeter::on()
     if(type==1) // Mason HCS-3302 USB
     {
         serialPort.write("SOUT0\r");
+
+        qDebug() << "DLTMultimeter: power on";
     }
 }
 
@@ -438,5 +440,19 @@ void DLTMultimeter::off()
     if(type==1) // Mason HCS-3302 USB
     {
         serialPort.write("SOUT1\r");
+
+        qDebug() << "DLTMultimeter: power off";
+    }
+}
+
+void DLTMultimeter::setVoltage(float value)
+{
+    if(type==1) // Mason HCS-3302 USB
+    {
+        QString text;
+        text = QString("VOLT%1\r").arg((int)(value*10));
+        serialPort.write(text.toLatin1());
+
+        qDebug() << "DLTMultimeter: setVoltage" << text;
     }
 }
diff --git a/dltmultimeter.h b/dltmultimeter.h
index 9a57dda..7c08acf 100644
--- a/dltmultimeter.h
+++ b/dltmultimeter.h
@@ -48,6 +48,7 @@ class DLTMultimeter : public QObject
 
     void on();
     void off();
+    void setVoltage(float value);
 
     QString getPowerName() { return powerName; }
     void setPowerName(const QString &powerName) { this->powerName = powerName; }
diff --git a/version.h b/version.h
index b0b8658..bd9d3c4 100644
--- a/version.h
+++ b/version.h
@@ -15,6 +15,6 @@
 #ifndef VERSION_H
 #define VERSION_H
 
-#define DLT_POWER_VERSION "v0.0.7"
+#define DLT_POWER_VERSION "v0.0.8"
 
 #endif // VERSION_H