diff --git a/index.html b/index.html
index c1512ad..370c024 100644
--- a/index.html
+++ b/index.html
@@ -22,7 +22,7 @@
 	<a class="sp_link" href="#">sp</a>
     </div>
     <button id="btnCurLocation" onClick="setCurLocation()">get your current location</button>
-    <input type="checkbox" value=yes name="sound" placeholder="ON" class="textbox">
+    <input type="checkbox" value=yes name="sound" placeholder="ON" sound on class="textbox">
 
  
     <script src="script.js">