diff --git a/components/i_feed/devices/vehicle.py b/components/i_feed/devices/vehicle.py
index 631de6e..c68cfd0 100644
--- a/components/i_feed/devices/vehicle.py
+++ b/components/i_feed/devices/vehicle.py
@@ -209,6 +209,10 @@ class Vehicle:
         self._daf_mb.send(pickle.dumps(self.daf))
 
     def new_velocity(self, response: bytes):
+        """
+        Will be invoked if new target velocity message received
+        :param response: pickled TargetVelocity object
+        """
         response: TargetVelocity = pickle.loads(response)
         velocity = response.target_velocity
         print('Received new velocity {}'.format(velocity))