diff --git a/src/main/java/de/com/baseband/clientboot/ClientBoot.java b/src/main/java/de/com/baseband/clientboot/ClientBoot.java
index 8fd3f3d..7be2b26 100644
--- a/src/main/java/de/com/baseband/clientboot/ClientBoot.java
+++ b/src/main/java/de/com/baseband/clientboot/ClientBoot.java
@@ -21,10 +21,15 @@ public class ClientBoot {
     }
 
     private final CBWindow window;
-    public final TCN data = new TCN();
+    public final TCN data;
 
     public ClientBoot(String name, int timeout) {
+        this(name, timeout, new TCN());
+    }
+
+    public ClientBoot(String name, int timeout, TCN data) {
         window = new CBWindow(name, this, timeout);
+        this.data = data;
     }
 
     public ClientBoot newScreen() {