diff --git a/www/index.html b/www/index.html
index 975b318..dddfdda 100644
--- a/www/index.html
+++ b/www/index.html
@@ -23,6 +23,7 @@
             <input type="range" min="0" max="99" id="shockIntensity" oninput="this.nextElementSibling.value = this.value">
             <output>0</output>
             <br>
+            <button onclick="shock();">Shock!</button>
             <h2>Vibrate</h2>
             <input type="range" min="0" max="99" id="vibrateIntensity" oninput="this.nextElementSibling.value = this.value">
             <output>0</output>