diff --git a/app/src/main/java/es/eoinrul/ecwt/DitDahGenerator.kt b/app/src/main/java/es/eoinrul/ecwt/DitDahGenerator.kt
index 959f7a5..95f297e 100644
--- a/app/src/main/java/es/eoinrul/ecwt/DitDahGenerator.kt
+++ b/app/src/main/java/es/eoinrul/ecwt/DitDahGenerator.kt
@@ -360,9 +360,11 @@ data class DitDahGeneratorSettings(var context : Context? = null) {
     init {
         if(context != null) {
             val sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context)
-            toneFrequency = sharedPreferences.getInt(context!!.getString(R.string.setting_tone_key), toneFrequency)
             wordsPerMinute = sharedPreferences.getInt(context!!.getString(R.string.setting_wpm_key), wordsPerMinute)
             farnsworthWordsPerMinute = sharedPreferences.getInt(context!!.getString(R.string.setting_effective_wpm_key), farnsworthWordsPerMinute)
+
+            // This one is a little strange; the ListPreference stores a string, which we need to parse
+            toneFrequency = sharedPreferences.getString(context!!.getString(R.string.setting_tone_key), toneFrequency.toString())!!.toInt()
         }
     }
 }
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 371ea90..f7ba2f7 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -18,7 +18,6 @@
     <string name="setting_effective_wpm_label">Effective Words per Minute</string>
     <string name="setting_effective_wpm_summary">Allows extra spacing between characters</string>
 
-
     <string name="setting_tone_key">sender_tone</string>
     <string name="setting_wpm_key">sender_wpm</string>
     <string name="setting_effective_wpm_key">sender_effective_wpm</string>
@@ -34,4 +33,24 @@
     <string name="setting_koch_lesson_vary_label">Variable group length</string>
     <string name="setting_koch_lesson_vary_off">Always groups of 5</string>
     <string name="setting_koch_lesson_vary_on">Groups between 2 and 6 characters</string>
+
+    <string-array name="tone_frequency_strings">
+        <item>400Hz</item>
+        <item>450Hz</item>
+        <item>500Hz</item>
+        <item>550Hz</item>
+        <item>600Hz</item>
+        <item>650Hz</item>
+        <item>700Hz</item>
+    </string-array>
+
+    <string-array name="tone_frequency_values">
+        <item>400</item>
+        <item>450</item>
+        <item>500</item>
+        <item>550</item>
+        <item>600</item>
+        <item>650</item>
+        <item>700</item>
+    </string-array>
 </resources>
diff --git a/app/src/main/res/xml/root_preferences.xml b/app/src/main/res/xml/root_preferences.xml
index 8cb2c1b..b28ac66 100644
--- a/app/src/main/res/xml/root_preferences.xml
+++ b/app/src/main/res/xml/root_preferences.xml
@@ -10,15 +10,12 @@
             android:summaryOn="YEAH"
             android:title="Switch preference" />
 
-        <SeekBarPreference
+        <ListPreference
             android:defaultValue="600"
-            android:max="900"
-            app:defaultValue="650"
-            app:key="@string/setting_tone_key"
-            app:min="500"
-            app:seekBarIncrement="50"
-            app:showSeekBarValue="true"
-            app:title="@string/setting_tone_frequency_label" />
+            android:entries="@array/tone_frequency_strings"
+            android:entryValues="@array/tone_frequency_values"
+            android:key="@string/setting_tone_key"
+            android:title="@string/setting_tone_frequency_label" />
 
         <SeekBarPreference
             android:defaultValue="600"