diff --git a/src/AcaciaZPushPlugin/AcaciaZPushPlugin/Features/SyncState/SyncStateDialog.Designer.cs b/src/AcaciaZPushPlugin/AcaciaZPushPlugin/Features/SyncState/SyncStateDialog.Designer.cs
index 94f2128..ead5216 100644
--- a/src/AcaciaZPushPlugin/AcaciaZPushPlugin/Features/SyncState/SyncStateDialog.Designer.cs
+++ b/src/AcaciaZPushPlugin/AcaciaZPushPlugin/Features/SyncState/SyncStateDialog.Designer.cs
@@ -156,7 +156,7 @@
             resources.GetString("comboTimeFrame.Items5"),
             resources.GetString("comboTimeFrame.Items6"),
             resources.GetString("comboTimeFrame.Items7"),
-            resources.GetString("comboTimeFrame.Items8")});
+            resources.GetString("comboTimeFrame.Items101")});   // custom time frame value
             this.comboTimeFrame.Name = "comboTimeFrame";
             this.comboTimeFrame.SelectedIndexChanged += new System.EventHandler(this.comboTimeFrame_SelectedIndexChanged);
             // 
diff --git a/src/AcaciaZPushPlugin/AcaciaZPushPlugin/Features/SyncState/SyncStateDialog.cs b/src/AcaciaZPushPlugin/AcaciaZPushPlugin/Features/SyncState/SyncStateDialog.cs
index bccaa5e..a6bf911 100644
--- a/src/AcaciaZPushPlugin/AcaciaZPushPlugin/Features/SyncState/SyncStateDialog.cs
+++ b/src/AcaciaZPushPlugin/AcaciaZPushPlugin/Features/SyncState/SyncStateDialog.cs
@@ -36,6 +36,8 @@ namespace Acacia.Features.SyncState
 
         private readonly Button[] _syncButtons;
 
+        private readonly System.ComponentModel.ComponentResourceManager resources;
+
         private ZPushAccount SelectedAccount
         {
             get
@@ -48,6 +50,9 @@ namespace Acacia.Features.SyncState
         {
             InitializeComponent();
 
+            // Used for handling custom time frame values.
+            resources = new System.ComponentModel.ComponentResourceManager(typeof(SyncStateDialog));
+
             // Ensure these are in sync with ResyncOption
             _syncButtons = new Button[]
             {
@@ -81,6 +86,9 @@ namespace Acacia.Features.SyncState
 
             if (SelectedAccount == null)
                 comboTimeFrame.SelectedIndex = 0;
+            // Custom values handling. Custom values will be appended into comboTimeFrame after the last standard value (7)
+            else if (SelectedAccount.SyncTimeFrame == (SyncTimeFrame)(int)SyncTimeFrame.YEAR_1) // 1 year
+                comboTimeFrame.SelectedIndex = comboTimeFrame.Items.IndexOf(resources.GetString("comboTimeFrame.Items101"));
             else
                 comboTimeFrame.SelectedIndex = (int)SelectedAccount.SyncTimeFrame;
 
@@ -97,8 +105,17 @@ namespace Acacia.Features.SyncState
             if (SelectedAccount != null)
             {
                 SyncTimeFrame timeFrame = (SyncTimeFrame)comboTimeFrame.SelectedIndex;
-                bool isDirty = timeFrame != SelectedAccount.SyncTimeFrame;
-                buttonApplyTimeFrame.Enabled = buttonResetTimeFrame.Enabled = isDirty;
+                // Handle custom values
+                if ((int)timeFrame == comboTimeFrame.Items.IndexOf(resources.GetString("comboTimeFrame.Items101")))
+                {
+                    bool isDirty = SelectedAccount.SyncTimeFrame != (SyncTimeFrame)(int)SyncTimeFrame.YEAR_1;
+                    buttonApplyTimeFrame.Enabled = buttonResetTimeFrame.Enabled = isDirty;
+                }
+                else
+                {
+                    bool isDirty = timeFrame != SelectedAccount.SyncTimeFrame;
+                    buttonApplyTimeFrame.Enabled = buttonResetTimeFrame.Enabled = isDirty;
+                }
             }
             else
             {
@@ -118,8 +135,16 @@ namespace Acacia.Features.SyncState
             {
                 Busy = true;
 
-                // TODO: do this in the background
-                _feature.SetDeviceOptions(SelectedAccount, (SyncTimeFrame)comboTimeFrame.SelectedIndex);
+                // Custom values handling. Custom values will be appended into comboTimeFrame after the last standard value (7)
+                if (comboTimeFrame.SelectedItem.Equals(resources.GetString("comboTimeFrame.Items101")))
+                {
+                    _feature.SetDeviceOptions(SelectedAccount, (SyncTimeFrame)(int)SyncTimeFrame.YEAR_1);
+                }
+                else
+                {
+                    // TODO: do this in the background
+                    _feature.SetDeviceOptions(SelectedAccount, (SyncTimeFrame)comboTimeFrame.SelectedIndex);
+                }
                 CheckTimeFrameDirty();
             }
         }
diff --git a/src/AcaciaZPushPlugin/AcaciaZPushPlugin/Features/SyncState/SyncStateDialog.resx b/src/AcaciaZPushPlugin/AcaciaZPushPlugin/Features/SyncState/SyncStateDialog.resx
index ce5dc53..c7427bd 100644
--- a/src/AcaciaZPushPlugin/AcaciaZPushPlugin/Features/SyncState/SyncStateDialog.resx
+++ b/src/AcaciaZPushPlugin/AcaciaZPushPlugin/Features/SyncState/SyncStateDialog.resx
@@ -444,7 +444,7 @@
   <data name="comboTimeFrame.Items7" xml:space="preserve">
     <value>6 months</value>
   </data>
-  <data name="comboTimeFrame.Items8" xml:space="preserve">
+  <data name="comboTimeFrame.Items101" xml:space="preserve">
     <value>1 year</value>
   </data>
   <data name="comboTimeFrame.Location" type="System.Drawing.Point, System.Drawing">
diff --git a/src/AcaciaZPushPlugin/AcaciaZPushPlugin/ZPush/ZPushTypes.cs b/src/AcaciaZPushPlugin/AcaciaZPushPlugin/ZPush/ZPushTypes.cs
index 06947c5..8306e65 100644
--- a/src/AcaciaZPushPlugin/AcaciaZPushPlugin/ZPush/ZPushTypes.cs
+++ b/src/AcaciaZPushPlugin/AcaciaZPushPlugin/ZPush/ZPushTypes.cs
@@ -162,7 +162,7 @@ namespace Acacia.ZPush
         MONTH_1,
         MONTH_3,
         MONTH_6,
-        YEAR_1
+        YEAR_1 = 101    // Custom value
     }
 
     public static class SyncTimeFrameMethods