diff --git a/takway/clients/web_socket_client_utils.py b/takway/clients/web_socket_client_utils.py
index bfbf364..4b202a7 100644
--- a/takway/clients/web_socket_client_utils.py
+++ b/takway/clients/web_socket_client_utils.py
@@ -384,6 +384,7 @@ class WebSocketClinet:
                     if audio_dict['is_end']:
                         self.listening_event.clear()
                         self.speaking_event.set()
+                        print(f"{datetime.now()}: Audio data send finished, switch to speaking mode.")
                     
             if not self.wakeup_event.is_set():
                 continue