diff --git a/app/src/main/res/layout/activity_light_setting.xml b/app/src/main/res/layout/activity_light_setting.xml
index 76031b4..972ab3b 100644
--- a/app/src/main/res/layout/activity_light_setting.xml
+++ b/app/src/main/res/layout/activity_light_setting.xml
@@ -19,6 +19,8 @@
             android:layout_height="@dimen/_100dp"
             android:layout_marginStart="@dimen/_140dp"
             android:layout_marginTop="@dimen/_160dp"
+            android:nextFocusLeft="@id/sb_light"
+            android:nextFocusRight="@id/sb_light"
             android:max="255"
             android:min="0"
             android:padding="0dp"
diff --git a/app/src/main/res/layout/activity_speed_setting.xml b/app/src/main/res/layout/activity_speed_setting.xml
index 7cedc75..7a3e5f4 100644
--- a/app/src/main/res/layout/activity_speed_setting.xml
+++ b/app/src/main/res/layout/activity_speed_setting.xml
@@ -19,8 +19,10 @@
             android:layout_height="@dimen/_100dp"
             android:layout_marginStart="@dimen/_140dp"
             android:layout_marginTop="@dimen/_160dp"
+            android:nextFocusLeft="@id/sb_speed"
+            android:nextFocusRight="@id/sb_speed"
             android:max="9"
-            android:min="0"
+            android:min="1"
             android:padding="0dp"
             android:progress="0" />