diff --git a/EduNetworkBuilder/EduNetworkBuilder.csproj b/EduNetworkBuilder/EduNetworkBuilder.csproj
index b44d915..1a73c03 100644
--- a/EduNetworkBuilder/EduNetworkBuilder.csproj
+++ b/EduNetworkBuilder/EduNetworkBuilder.csproj
@@ -413,6 +413,7 @@
     </FileAssociation>
   </ItemGroup>
   <ItemGroup>
+    <None Include="Resources\tree.png" />
     <None Include="Resources\WAP.png" />
     <None Include="Resources\tablet.png" />
     <None Include="Resources\Server.png" />
diff --git a/EduNetworkBuilder/NB.cs b/EduNetworkBuilder/NB.cs
index ae7af78..6730202 100644
--- a/EduNetworkBuilder/NB.cs
+++ b/EduNetworkBuilder/NB.cs
@@ -34,7 +34,7 @@ namespace EduNetworkBuilder
         dhcp_answer, vpn_packet, tun_packet, tracert_request, tracert_reply }
     public enum ResponseToPacket { none, accept, masq, drop, reject }
     public enum DebugLevel { none=0, info=1, routing=2, switching=4, natting=8, filtering=16, debug=32 , packet=64, all=127}
-    public enum NetworkComponentType { none, router, net_switch, net_hub, laptop, pc, server, wap , 
+    public enum NetworkComponentType { none, router, net_switch, net_hub, laptop, pc, server, wap , tree,
         wrouter, wbridge, wrepeater, link, firewall, ip_phone, printer, copier, microwave, fluorescent, cellphone, tablet }
     public enum NicType { none, lo, eth, wlan, wan, vpn, tun, management_interface, port, wport }
     public enum IPAddressType {  ip, gw, route, ip_only }
diff --git a/EduNetworkBuilder/NetworkBuilder.cs b/EduNetworkBuilder/NetworkBuilder.cs
index b4447b7..4823a4e 100644
--- a/EduNetworkBuilder/NetworkBuilder.cs
+++ b/EduNetworkBuilder/NetworkBuilder.cs
@@ -403,6 +403,7 @@ namespace EduNetworkBuilder
             BuildButton("btnWRepeater", Properties.Resources.WRepeater, NB.Translate("NB_BuildBtnRepeat"));
             BuildButton("btnCellphone", Properties.Resources.cellphone, NB.Translate("NB_BuildBtnCell"));
             BuildButton("btnTablet", Properties.Resources.tablet, NB.Translate("NB_BuildBtnTablet"));
+            BuildButton("btnTree", Properties.Resources.tree, NB.Translate("NB_BuildBtnTree"));
             BuildButton("btnLink", Properties.Resources.link, NB.Translate("NB_BuildBtnCable"));
             BuildButton("btnSelect", Properties.Resources.select, NB.Translate("NB_BuildBtnSelect"));
         }
@@ -1485,9 +1486,12 @@ namespace EduNetworkBuilder
                         case "btnWRepeater":
                             NC = myNetwork.AddItem(NetworkComponentType.wrepeater, CenteredLocation);
                             break;
+                        case "btnTree":
+                            NC = myNetwork.AddItem(NetworkComponentType.tree, CenteredLocation);
+                            break;
 
                     }
-                    if(NC != null && NB.GetComponentType(NC) == GeneralComponentType.device)
+                    if (NC != null && NB.GetComponentType(NC) == GeneralComponentType.device)
                     {
                         ItemClickedOn = (NetworkDevice)NC;
                     }
diff --git a/EduNetworkBuilder/NetworkDevice.cs b/EduNetworkBuilder/NetworkDevice.cs
index 75a2ed3..39dc83b 100644
--- a/EduNetworkBuilder/NetworkDevice.cs
+++ b/EduNetworkBuilder/NetworkDevice.cs
@@ -654,6 +654,9 @@ namespace EduNetworkBuilder
                 case NetworkComponentType.tablet:
                     MyImage = Properties.Resources.tablet;
                     break;
+                case NetworkComponentType.tree:
+                    MyImage = Properties.Resources.tree;
+                    break;
             }
         }
 
diff --git a/EduNetworkBuilder/Properties/Resources.Designer.cs b/EduNetworkBuilder/Properties/Resources.Designer.cs
index a52c2dc..1fdf077 100644
--- a/EduNetworkBuilder/Properties/Resources.Designer.cs
+++ b/EduNetworkBuilder/Properties/Resources.Designer.cs
@@ -1270,6 +1270,16 @@ namespace EduNetworkBuilder.Properties {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized resource of type System.Drawing.Bitmap.
+        /// </summary>
+        internal static System.Drawing.Bitmap tree {
+            get {
+                object obj = ResourceManager.GetObject("tree", resourceCulture);
+                return ((System.Drawing.Bitmap)(obj));
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized resource of type System.Byte[].
         /// </summary>
diff --git a/EduNetworkBuilder/Properties/Resources.resx b/EduNetworkBuilder/Properties/Resources.resx
index bb29031..9018bf3 100644
--- a/EduNetworkBuilder/Properties/Resources.resx
+++ b/EduNetworkBuilder/Properties/Resources.resx
@@ -505,4 +505,7 @@
   <data name="Level0_Frozen" type="System.Resources.ResXFileRef, System.Windows.Forms">
     <value>..\Resources\Level0_Frozen.enbx;System.Byte[], mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
   </data>
+  <data name="tree" type="System.Resources.ResXFileRef, System.Windows.Forms">
+    <value>..\Resources\tree.png;System.Drawing.Bitmap, System.Drawing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/EduNetworkBuilder/Resources/languages/edustrings.resx b/EduNetworkBuilder/Resources/languages/edustrings.resx
index e80a9f7..9798125 100644
--- a/EduNetworkBuilder/Resources/languages/edustrings.resx
+++ b/EduNetworkBuilder/Resources/languages/edustrings.resx
@@ -2029,4 +2029,8 @@
     <value>Translate</value>
     <comment>TW_Translate = Translate</comment>
   </data>
+  <data name="NB_BuildBtnTree" xml:space="preserve">
+    <value>Add a tree to the network to block wireless signals</value>
+    <comment>NB_BuildBtnTree = Add a tree to the network to block wireless signals</comment>
+  </data>
 </root>
\ No newline at end of file
diff --git a/EduNetworkBuilder/Resources/tree.png b/EduNetworkBuilder/Resources/tree.png
new file mode 100644
index 0000000..d09d998
Binary files /dev/null and b/EduNetworkBuilder/Resources/tree.png differ