diff --git a/db/TrafficLooper.cpp b/db/TrafficLooper.cpp
index 09e69fb..b10e5ee 100644
--- a/db/TrafficLooper.cpp
+++ b/db/TrafficLooper.cpp
@@ -80,7 +80,7 @@ namespace NekoRay::traffic {
         elapsedTimer.start();
         while (true) {
             auto sleep_ms = dataStore->traffic_loop_interval;
-            if (sleep_ms < 500 || sleep_ms > 2000) sleep_ms = 1000;
+            if (sleep_ms < 500 || sleep_ms > 5000) sleep_ms = 1000;
             QThread::msleep(sleep_ms);
             if (dataStore->traffic_loop_interval == 0) continue; // user disabled
 
diff --git a/main/NekoRay_DataStore.hpp b/main/NekoRay_DataStore.hpp
index 002c27c..e52db53 100644
--- a/main/NekoRay_DataStore.hpp
+++ b/main/NekoRay_DataStore.hpp
@@ -94,7 +94,7 @@ namespace NekoRay {
         QString log_level = "warning";
         QString test_url = "http://cp.cloudflare.com/";
         int test_concurrent = 5;
-        int traffic_loop_interval = 500;
+        int traffic_loop_interval = 1000;
         bool connection_statistics = false;
         int current_group = 0; // group id
         QString mux_protocol = "";
diff --git a/translations/fa_IR.ts b/translations/fa_IR.ts
index 47b9ee0..bf59b53 100644
--- a/translations/fa_IR.ts
+++ b/translations/fa_IR.ts
@@ -100,14 +100,6 @@
         <source>Statistics refresh rate</source>
         <translation>نرخ تازه سازی آمار ترافیک</translation>
     </message>
-    <message>
-        <source>Fast</source>
-        <translation>سریع</translation>
-    </message>
-    <message>
-        <source>Slow</source>
-        <translation>کند</translation>
-    </message>
     <message>
         <source>Off</source>
         <translation>خاموش</translation>
diff --git a/translations/zh_CN.ts b/translations/zh_CN.ts
index 31dd760..21ad5c6 100644
--- a/translations/zh_CN.ts
+++ b/translations/zh_CN.ts
@@ -99,14 +99,6 @@
         <source>Statistics refresh rate</source>
         <translation>流量统计刷新率</translation>
     </message>
-    <message>
-        <source>Fast</source>
-        <translation>快</translation>
-    </message>
-    <message>
-        <source>Slow</source>
-        <translation>慢</translation>
-    </message>
     <message>
         <source>Off</source>
         <translation>关闭</translation>
diff --git a/ui/dialog_basic_settings.cpp b/ui/dialog_basic_settings.cpp
index 3c63ab6..43b4ff1 100644
--- a/ui/dialog_basic_settings.cpp
+++ b/ui/dialog_basic_settings.cpp
@@ -110,8 +110,14 @@ DialogBasicSettings::DialogBasicSettings(QWidget *parent)
         ui->rfsh_r->setCurrentIndex(0);
     } else if (NekoRay::dataStore->traffic_loop_interval == 1000) {
         ui->rfsh_r->setCurrentIndex(1);
-    } else {
+    } else if (NekoRay::dataStore->traffic_loop_interval == 2000) {
         ui->rfsh_r->setCurrentIndex(2);
+    } else if (NekoRay::dataStore->traffic_loop_interval == 3000) {
+        ui->rfsh_r->setCurrentIndex(3);
+    } else if (NekoRay::dataStore->traffic_loop_interval == 5000) {
+        ui->rfsh_r->setCurrentIndex(4);
+    } else {
+        ui->rfsh_r->setCurrentIndex(5);
     }
     //
     ui->language->setCurrentIndex(NekoRay::dataStore->language);
@@ -274,6 +280,12 @@ void DialogBasicSettings::accept() {
         NekoRay::dataStore->traffic_loop_interval = 500;
     } else if (ui->rfsh_r->currentIndex() == 1) {
         NekoRay::dataStore->traffic_loop_interval = 1000;
+    } else if (ui->rfsh_r->currentIndex() == 2) {
+        NekoRay::dataStore->traffic_loop_interval = 2000;
+    } else if (ui->rfsh_r->currentIndex() == 3) {
+        NekoRay::dataStore->traffic_loop_interval = 3000;
+    } else if (ui->rfsh_r->currentIndex() == 4) {
+        NekoRay::dataStore->traffic_loop_interval = 5000;
     } else {
         NekoRay::dataStore->traffic_loop_interval = 0;
     }
diff --git a/ui/dialog_basic_settings.ui b/ui/dialog_basic_settings.ui
index f27cda4..e347cb1 100644
--- a/ui/dialog_basic_settings.ui
+++ b/ui/dialog_basic_settings.ui
@@ -367,12 +367,27 @@
              <widget class="QComboBox" name="rfsh_r">
               <item>
                <property name="text">
-                <string>Fast</string>
+                <string notr="true">500ms</string>
                </property>
               </item>
               <item>
                <property name="text">
-                <string>Slow</string>
+                <string notr="true">1s</string>
+               </property>
+              </item>
+              <item>
+               <property name="text">
+                <string notr="true">2s</string>
+               </property>
+              </item>
+              <item>
+               <property name="text">
+                <string notr="true">3s</string>
+               </property>
+              </item>
+              <item>
+               <property name="text">
+                <string notr="true">5s</string>
                </property>
               </item>
               <item>