diff --git a/Geraete.config b/Geraete.config
index a98abfd..170bbd6 100644
--- a/Geraete.config
+++ b/Geraete.config
@@ -1,4 +1,4 @@
-CD=device.cdPlayer.CdPlayer
+CD=device.cdPlayer.CDPlayer
 Radio=device.radioPlayer.RadioPlayer
 USB=device.usbPlayer.UsbPlayer
 
diff --git a/src/main/java/BordComputer.java b/src/main/java/BordComputer.java
index e0af6dc..7563899 100644
--- a/src/main/java/BordComputer.java
+++ b/src/main/java/BordComputer.java
@@ -1,12 +1,17 @@
+import device.Device;
+
 import java.io.FileReader;
+import java.lang.reflect.InvocationTargetException;
 import java.util.Arrays;
 import java.util.Properties;
 
 public class BordComputer {
 
     String[] deviceNames;
+    Device[] installedDevices;
+    Device activeDevice = null;
 
-    public void readConfig() {
+    public void readConfig() throws ClassNotFoundException, InvocationTargetException, NoSuchMethodException, InstantiationException, IllegalAccessException {
 
         try (FileReader reader = new FileReader("Geraete.config")) {
             Properties properties = new Properties();
@@ -15,8 +20,19 @@ public class BordComputer {
             Arrays.sort(values);
             deviceNames = new String[values.length];
             System.arraycopy(values, 0, deviceNames, 0, properties.size());
+            installedDevices = new Device[values.length];
         } catch (Exception e) {
             e.printStackTrace();
         }
+        setDevices();
+        activeDevice = installedDevices[0];
+    }
+
+    public void setDevices() throws NoSuchMethodException, InvocationTargetException, InstantiationException, IllegalAccessException, ClassNotFoundException {
+        Class<?> c;
+        for (int i = 0; i < deviceNames.length; i++) {
+            c = Class.forName(deviceNames[i]);
+            installedDevices[i] = (Device) c.getConstructor().newInstance();
+        }
     }
 }
diff --git a/src/test/java/BordComputerTest.java b/src/test/java/BordComputerTest.java
index 3992b59..6772d99 100644
--- a/src/test/java/BordComputerTest.java
+++ b/src/test/java/BordComputerTest.java
@@ -1,10 +1,14 @@
+import device.Device;
+import device.cdPlayer.CDPlayer;
 import device.radioPlayer.RadioPlayer;
+import device.usbPlayer.UsbPlayer;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.Arguments;
 import org.junit.jupiter.params.provider.MethodSource;
 
 import java.io.FileReader;
 import java.io.IOException;
+import java.lang.reflect.InvocationTargetException;
 import java.util.Properties;
 import java.util.stream.Stream;
 
@@ -17,15 +21,10 @@ class BordComputerTest {
     @MethodSource("readConfigOptions")
     void readConfigTest(String testName, String testTyp, BordComputer testBc, String expectedResult) {
         if (testTyp.equals("count")) {
-            int count = 0;
-            try (FileReader reader = new FileReader("Geraete.config")) {
-                Properties properties = new Properties();
-                properties.load(reader);
-                count = properties.size();
-            } catch (IOException e) {
-                e.printStackTrace();
-            }
-            assertThat(count).describedAs(testName).isEqualTo(testBc.deviceNames.length);
+            assertThat(fileReaderCount()).describedAs(testName).isEqualTo(testBc.deviceNames.length);
+        }
+        if (testTyp.equals("count1")) {
+            assertThat(fileReaderCount()).describedAs(testName).isEqualTo(testBc.installedDevices.length);
         }
         if (testTyp.equals("item1")) {
             assertThat(testBc.deviceNames[0]).describedAs(testName).isEqualTo(expectedResult);
@@ -38,16 +37,48 @@ class BordComputerTest {
         }
     }
 
-    static Stream<Arguments> readConfigOptions() {
+    static Stream<Arguments> readConfigOptions() throws ClassNotFoundException, InvocationTargetException, NoSuchMethodException, InstantiationException, IllegalAccessException {
         BordComputer bc1 = new BordComputer();
         bc1.readConfig();
 
         return Stream.of(
                 Arguments.of("Check if file reader is getting every item in Geraete.config", "count", bc1, ""),
-                Arguments.of("Check if file reader is getting the first element", "item1", bc1, "device.cdPlayer.CdPlayer"),
+                Arguments.of("Check if file reader is getting the first element", "item1", bc1, "device.cdPlayer.CDPlayer"),
                 Arguments.of("Check if file reader is getting the second element", "item2", bc1, "device.radioPlayer.RadioPlayer"),
-                Arguments.of("Check if file reader is getting the third element", "item3", bc1, "device.usbPlayer.UsbPlayer")
+                Arguments.of("Check if file reader is getting the third element", "item3", bc1, "device.usbPlayer.UsbPlayer"),
+                Arguments.of("Test if installed devices has the length", "count1", bc1, "")
+        );
+    }
+
+    @ParameterizedTest
+    @MethodSource("setDevicesOptions")
+    void setDevicesTest(String testName, BordComputer testBc, String testTyp, Boolean bool) {
+        Boolean boolActual = null;
+        if (testTyp.equals("0")) boolActual = (testBc.installedDevices[0] instanceof CDPlayer);
+        if (testTyp.equals("1")) boolActual = (testBc.installedDevices[1] instanceof RadioPlayer);
+        if (testTyp.equals("2")) boolActual = (testBc.installedDevices[2] instanceof UsbPlayer);
+        assertThat(boolActual).describedAs(testName).isEqualTo(bool);
+    }
+
+    static Stream<Arguments> setDevicesOptions() throws ClassNotFoundException, InvocationTargetException, NoSuchMethodException, InstantiationException, IllegalAccessException {
+        BordComputer bc = new BordComputer();
+        bc.readConfig();
+        return Stream.of(
+                Arguments.of("Test if installedDevices[0] is instance of CDPlayer", bc, "0", true),
+                Arguments.of("Test if installedDevices[1] is instance of RadioPlayer", bc, "1", true),
+                Arguments.of("Test if installedDevices[2] is instance of UsbPlayer", bc, "2", true)
         );
     }
 
+    public int fileReaderCount() {
+        int count = 0;
+        try (FileReader reader = new FileReader("Geraete.config")) {
+            Properties properties = new Properties();
+            properties.load(reader);
+            count = properties.size();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return count;
+    }
 }
\ No newline at end of file