diff --git a/assets/js/ChartManager.js b/assets/js/ChartManager.js
index c74d20e..74e74af 100644
--- a/assets/js/ChartManager.js
+++ b/assets/js/ChartManager.js
@@ -161,8 +161,12 @@ $("#testMicButton").click(() => {
         createWavFileAndDownload(rawData); // When recording stops, create WAV file
         rawData = []; // Clear rawData after saving
         $("#testMicButton").text("Test Occl.");
+        $("#testMicButton").removeClass("btn-stop");
+        $("#testMicButton").addClass("btn-control");
     } else {
         $("#testMicButton").text("Stop");
+        $("#testMicButton").addClass("btn-stop");
+        $("#testMicButton").removeClass("btn-control");
     }
 });
 
diff --git a/index.html b/index.html
index 2bb110e..6dbb828 100644
--- a/index.html
+++ b/index.html
@@ -126,7 +126,7 @@
         .btn-stop {
             background-color: #f27777 !important;
             color: black !important;
-            font-size: 1.2em;
+            
         }
 
         /* Sensor Control Card */
@@ -346,7 +346,7 @@ <h5 class="card-title">Sensor Control</h5>
                                 <button disabled id="setSensorConfigurationButton"
                                     class="btn btn-control is-connect-enabled flex-fill">Set Configuration</button>
                                 <button disabled id="testMicButton"
-                                    class="btn btn-control is-connect-enabled ms-3">Test Occl.</button>
+                                    class="btn btn-control is-connect-enabled ms-3 " style="min-width: 120px;">Test Occl.</button>
                                 <button disabled
                                     class="btn btn-disable-sensors btn-stop is-connect-enabled ms-3">Off</button>
                             </div>