diff --git a/doc/main/iodevices/index.rst b/doc/main/iodevices/index.rst
index 052ed5e..2c170d3 100644
--- a/doc/main/iodevices/index.rst
+++ b/doc/main/iodevices/index.rst
@@ -1,8 +1,7 @@
 :mod:`iodevices <pybricks.iodevices>` -- Generic I/O Devices
 ============================================================
 
-.. automodule:: pybricks.iodevices
-    :no-members:
+.. module:: pybricks.iodevices
 
 .. toctree::
    :maxdepth: 1
@@ -10,6 +9,12 @@
 
    pupdevice
 
+
+This module has classes for generic input/output devices. It is available on
+these hubs:
+
+.. pybricks-requirements:: pybricks-iodevices
+
 .. pybricks-classlink:: PUPDevice
 
 .. figure:: ../../main/images/sensor_pup.png