diff --git a/setup.py b/setup.py
index 2ebef96..bb73e04 100644
--- a/setup.py
+++ b/setup.py
@@ -22,11 +22,11 @@
 
 setup(
     name = 'tcutils',
-    version = "0.3",
+    version = "0.4",
     description = "Cheng Tang 's python libraries",
     author = 'Cheng Tang',
     author_email = 'cashtang@gmail.com',
     platforms=['All'],
     scripts=['vcprojred.py'],
     packages=['tcutils']
-    )
\ No newline at end of file
+    )
diff --git a/tcutils/pyDecard.py b/tcutils/pyDecard.py
index 5821a4f..a8cece3 100644
--- a/tcutils/pyDecard.py
+++ b/tcutils/pyDecard.py
@@ -210,8 +210,8 @@
             return None
         return codecs.encode(resp, 'hex').upper()
 
-    def beep(self):
-        py_decard.dll_handle.dc_beep(py_decard.device_handle, 10)
+    def beep(self, time=10):
+        py_decard.dll_handle.dc_beep(py_decard.device_handle, time)
 
     def auth_card(self, sectno, key, key_type):
         assert key_type in (py_decard.KEY_A, py_decard.KEY_B), u"密钥类型错误"