diff --git a/eyestrainreminder/EyeStrainReminder.py b/eyestrainreminder/EyeStrainReminder.py
index 8f5414c..3d1e928 100755
--- a/eyestrainreminder/EyeStrainReminder.py
+++ b/eyestrainreminder/EyeStrainReminder.py
@@ -18,63 +18,76 @@ MILLISECOND = 1000
 MINUTE = 60
 DIR = os.path.dirname(os.path.abspath(__file__))
 
-icon = mute = disable_notifs = invert_icons = notify_thread = sound = None
+icon = mute = disable_notifs = invert_icons = notify_thread = start_sound = end_sound = None
+
 
 def init():
     print("Initializing EyeStrainReminder...")
     notify2.init(NAME)
 
+
 def create_tray_icon():
     global icon
     image = get_image()
     icon = pystray.Icon(NAME, image, NAME, generate_menu_items())
     icon.run()
 
+
 def update_icon():
     global icon
     image = get_image()
     icon.icon = image
 
+
 def get_image():
     theme = [[DIR + "/files/eye_light.png", DIR + "/files/eye_dark.png"],
-            [DIR + "/files/eye_dark.png", DIR + "/files/eye_light.png"]]
+             [DIR + "/files/eye_dark.png", DIR + "/files/eye_light.png"]]
     return Image.open(theme[invert_icons][disable_notifs])
 
-def generate_menu_items():   
+
+def generate_menu_items():
     menu_items = []
     menu_items.append(item('Mute' if not mute else 'Unmute', toggle_mute))
-    menu_items.append(item('Do Not Disturb' if not disable_notifs else 'Enable Notifications', toggle_notifications))
+    menu_items.append(item(
+        'Do Not Disturb' if not disable_notifs else 'Enable Notifications', toggle_notifications))
     menu_items.append(menu.SEPARATOR)
     menu_items.append(item('Exit', exit))
     return menu_items
 
+
 def toggle_mute():
     global mute
     mute = not mute
     update_menu()
 
+
 def toggle_notifications():
     global disable_notifs
     disable_notifs = not disable_notifs
     update_menu()
     update_icon()
 
+
 def exit():
     global icon
     icon.stop()
     os._exit(0)
 
+
 def update_menu():
     global icon
     icon.menu = generate_menu_items()
     icon.update_menu()
 
+
 def uninit():
     notify2.uninit()
 
+
 def wait():
     sleep(TIMEOUT*MINUTE)
 
+
 def send_notification():
     if not disable_notifs:
         notify(MESSAGE)
@@ -84,30 +97,41 @@ def send_notification():
             sleep(10)
         notify(MESSAGE_MISSED)
 
+
 def notify(message):
     print(message)
-    notification = notify2.Notification(NAME, message, "notification-device-eject")
+    notification = notify2.Notification(
+        NAME, message, "notification-device-eject")
     notification.set_timeout(TIMEOUT * MILLISECOND)
     notification.set_urgency(notify2.URGENCY_LOW)
     notification.show()
-    play_sound()
+    play_sound(start_sound)
     sleep(TIMEOUT)
     notification.close()
-    play_sound()        
+    play_sound(end_sound)
 
-def play_sound():
+
+def play_sound(sound):
     if not mute:
         playsound(sound)
 
+
 def parse_args():
     parser = argparse.ArgumentParser()
-    parser.add_argument("-i", "--invert_icons", action="store_true", default=False, help="Default to the dark icon for light themes")
-    parser.add_argument("-m", "--mute", action="store_true", default=False, help="Mute notification sounds by default")
-    parser.add_argument("-n", "--disable_notifs", action="store_true", default=False, help="Disable notifications by default")
-    parser.add_argument("-s", "--sound", action="store", default=DIR + "/files/default.wav", help="Custom notification sound")
+    parser.add_argument("-i", "--invert_icons", action="store_true",
+                        default=False, help="Default to the dark icon for light themes")
+    parser.add_argument("-m", "--mute", action="store_true",
+                        default=False, help="Mute notification sounds by default")
+    parser.add_argument("-n", "--disable_notifs", action="store_true",
+                        default=False, help="Disable notifications by default")
+    parser.add_argument("-ss", "--start_sound", action="store", default=DIR +
+                        "/files/ptt-s.wav", help="Custom start notification sound")
+    parser.add_argument("-es", "--end_sound", action="store", default=DIR +
+                        "/files/ptt-e.wav", help="Custom end notification sound")
     args = parser.parse_args()
     globals().update(args.__dict__)
 
+
 def notification_loop():
     init()
     while 1:
@@ -115,12 +139,15 @@ def notification_loop():
         send_notification()
     uninit()
 
+
 def main():
     parse_args()
-    notify_thread = threading.Thread(target=notification_loop, name="Notify Thread")
+    notify_thread = threading.Thread(
+        target=notification_loop, name="Notify Thread")
     notify_thread.start()
     create_tray_icon()
     notify_thread.join()
 
+
 if __name__ == '__main__':
     main()
diff --git a/eyestrainreminder/files/ptt-e.wav b/eyestrainreminder/files/ptt-e.wav
new file mode 100644
index 0000000..2e2815c
Binary files /dev/null and b/eyestrainreminder/files/ptt-e.wav differ
diff --git a/eyestrainreminder/files/ptt-s.wav b/eyestrainreminder/files/ptt-s.wav
new file mode 100644
index 0000000..a2407eb
Binary files /dev/null and b/eyestrainreminder/files/ptt-s.wav differ