diff --git a/popup__iframe.html b/popup__iframe.html
index d2b8d77f..1e935efe 100644
--- a/popup__iframe.html
+++ b/popup__iframe.html
@@ -191,7 +191,11 @@
             <button type="button" class="btn btn-default col-xs-4">Right</button>
           </div>
         </div>
-        <div style="display: none;" class="mouse__config mouse__config--speed">
+        <div style="display: none;" class="mouse__config mouse__config--speed text-center">
+          <div class="btn-group btn-group-lg" role="group">
+            <button type="button" class="btn btn-default">-</button>
+            <button type="button" class="btn btn-default">+</button>
+          </div>
         </div>
       </div>
     </div>