diff --git a/src/mebo/robot.py b/src/mebo/robot.py
index da4f0a3..b9789ea 100644
--- a/src/mebo/robot.py
+++ b/src/mebo/robot.py
@@ -532,7 +532,7 @@ def speaker(self):
         set_volume = partial(self._request, req="set_spk_volume")
         set_volume.__doc__ = """Set the volume of the speaker
 
-        The value passed in to set the volume must be in the range [0, 100]
+        The value passed in to set the volume must be in the range [0, 10]
         """
         play_sound = partial(self._request, req="audio_out0")
         # TODO: how do you change what noise is played?