diff --git a/oec/controller.py b/oec/controller.py
index 4e80653..b08a4b3 100644
--- a/oec/controller.py
+++ b/oec/controller.py
@@ -9,6 +9,7 @@ from coax import poll, poll_ack, PollAction, KeystrokePollResponse, ReceiveTimeo
                  ReceiveError, ProtocolError
 
 from .terminal import Terminal, read_terminal_ids
+from .keyboard import Key
 from .session import SessionDisconnectedError
 
 class Controller:
@@ -155,7 +156,9 @@ class Controller:
         if not key:
             return
 
-        if self.session:
+        if key == Key.CLICKER:
+            self.terminal.keyboard.clicker = not self.terminal.keyboard.clicker
+        elif self.session:
             self.session.handle_key(key, modifiers, scan_code)
 
     def _poll(self):
diff --git a/oec/keyboard.py b/oec/keyboard.py
index ee05614..7c7c0c3 100644
--- a/oec/keyboard.py
+++ b/oec/keyboard.py
@@ -114,7 +114,7 @@ class Key(Enum):
     CURSOR_SELECT = 402
     CURSOR_BLINK = 403
     ERASE_EOF = 404
-    VOLUME = 405
+    CLICKER = 405
     ALT_CURSOR = 406
     IDENT = 407
 
@@ -303,6 +303,8 @@ class Keyboard:
 
         self.modifier_release = False
 
+        self.clicker = False
+
     def get_key(self, scan_code):
         """Map a scan code to key and update modifiers state."""
         key = self.keymap.default.get(scan_code)
diff --git a/oec/keymap_3278_2.py b/oec/keymap_3278_2.py
index 4893dbd..b18f2b1 100644
--- a/oec/keymap_3278_2.py
+++ b/oec/keymap_3278_2.py
@@ -14,7 +14,7 @@ KEYMAP_DEFAULT = {
     84: Key.CURSOR_BLINK,
     85: Key.ERASE_EOF,
     86: Key.PRINT,
-    87: Key.VOLUME,
+    87: Key.CLICKER,
 
     # First Row
     61: Key.BACKTICK,
diff --git a/oec/terminal.py b/oec/terminal.py
index c7867b9..d8c1bd3 100644
--- a/oec/terminal.py
+++ b/oec/terminal.py
@@ -70,6 +70,7 @@ class Terminal:
         self.keyboard = Keyboard(keymap)
 
         self.alarm = False
+        self.last_poll_keyboard_clicker = None
 
     def sound_alarm(self):
         self.alarm = True
@@ -80,4 +81,9 @@ class Terminal:
 
             return PollAction.ALARM
 
+        if self.keyboard.clicker != self.last_poll_keyboard_clicker:
+            self.last_poll_keyboard_clicker = self.keyboard.clicker
+
+            return PollAction.ENABLE_KEYBOARD_CLICKER if self.keyboard.clicker else PollAction.DISABLE_KEYBOARD_CLICKER
+
         return PollAction.NONE
diff --git a/tests/test_controller.py b/tests/test_controller.py
index 1250eac..390c442 100644
--- a/tests/test_controller.py
+++ b/tests/test_controller.py
@@ -114,6 +114,25 @@ class RunLoopTestCase(unittest.TestCase):
 
         self.assertFalse(self.controller.terminal.alarm)
 
+    def test_clicker_toggle(self):
+        self._assert_run_loop(0, PowerOnResetCompletePollResponse(0xa), 0, True)
+
+        self.assertFalse(self.controller.terminal.keyboard.clicker)
+
+        self._assert_run_loop(0, KeystrokePollResponse(0b0101011110), 0, True)
+        self._assert_run_loop(0, None, 0, False)
+
+        self.assertTrue(self.controller.terminal.keyboard.clicker)
+
+        self.assertEqual(self.poll_mock.call_args[0][1], PollAction.ENABLE_KEYBOARD_CLICKER)
+
+        self._assert_run_loop(0.5, KeystrokePollResponse(0b0101011110), 0.5, True)
+        self._assert_run_loop(1, None, 0, False)
+
+        self.assertFalse(self.controller.terminal.keyboard.clicker)
+
+        self.assertEqual(self.poll_mock.call_args[0][1], PollAction.DISABLE_KEYBOARD_CLICKER)
+
     def _assert_run_loop(self, poll_time, poll_response, expected_delay, expected_poll_ack):
         # Arrange
         self.poll_mock.side_effect = [poll_response]