Update MLI-404011.md (#456)

Adding a few details about groups binding.

docs/devices/MLI-404011.md

@@ -17,12 +17,26 @@ description: "Integrate your Müller Licht MLI-404011 via Zigbee2MQTT with whate
 
 ## Notes
 
-
 ### Pairing
 Remove the battery cover and use the cover to press the button above the batteries.
 Press and hold this button for 10-20 seconds and release the button.
 After that the remote should show up as a paired device.
 
+### Groups binding
+This remote is able to deal with 4 groups:
+group0 = All three leds lit
+group1 = first led lit
+group2 = second led lit
+group3 = third let lit
+
+you can direct bind each remote group with a different zigbee group, however there is a caveat: the four zigbee groups have to use consecutive group ids.
+The group you will bind (using the frontend or [mqtt command](../information/binding.html)) will be bound to group0 of the remote.
+The 3 consecutive groups will be bound to group1 to group3.
+
+This means that you probably should carefully [define your groups id](../information/mqtt_topics_and_message_structure.html#zigbee2mqttbridgeconfigadd_group)  when creating them. 
+
+It is possible to bind to a device instead of a group. The device will be bound to group0. 
+In this case, group0 to group3 will not be usable.
 
 ## Manual Home Assistant configuration
 Although Home Assistant integration through [MQTT discovery](../integration/home_assistant) is preferred,