diff --git a/workdir/tutorials/buffered-ports/writer_bp.py b/workdir/tutorials/buffered-ports/writer_bp.py
index bca01c4..047b572 100644
--- a/workdir/tutorials/buffered-ports/writer_bp.py
+++ b/workdir/tutorials/buffered-ports/writer_bp.py
@@ -14,6 +14,11 @@
 
 # define ports
 outport = yarp.BufferedPortBottle()
+# alternative buffered port classes depending on the underlying data type:
+# - yarp.BufferedPortProperty
+# - yarp.BufferedPortImage(Rgb|Rgba|Mono|Mono16|Int|Float|RgbFloat)
+# - yarp.BufferedPortVector (yarp.DVector)
+# - yarp.BufferedPortSound
 
 # activate ports
 outport.open("/writer")
@@ -35,4 +40,4 @@
 outport.close()
 
 # close the network
-yarp.Network.fini()
\ No newline at end of file
+yarp.Network.fini()