diff --git a/popup.html b/popup.html
index 8d00d09..ca7dd0b 100644
--- a/popup.html
+++ b/popup.html
@@ -8,6 +8,7 @@
   <p>Customize the frequency of the binaural beats:</p>
   <input type="range" min="1" max="1000" value="440" class="slider" id="frequencySlider">
   <p id="frequencyDisplay">Frequency: 440 Hz</p>
+  <button id="togglePlayPause">Play</button>
   <script src="popup.js"></script>
 </body>
-</html>
\ No newline at end of file
+</html>