diff --git a/advanced/common/usb/src/lib.rs b/advanced/common/usb/src/lib.rs
index 7e7b3b5..e3762d9 100644
--- a/advanced/common/usb/src/lib.rs
+++ b/advanced/common/usb/src/lib.rs
@@ -54,13 +54,15 @@ impl Request {
         const SET_ADDRESS: u8 = 5;
 
         // TODO implement another branch handling GET_DESCRIPTOR requests:
-
-        // 1. get descriptor type and descriptor index from wValue
-
-        // 2. confirm that the descriptor
-        //    - is of type DEVICE and
-        //    - has descriptor index 0 (i.e. it is the first implemented descriptor for this type) and
-        //    - has wIndex 0 (i.e. no language ID since it's not a string descriptor)
+        //
+        // 1. get descriptor type and descriptor index from `wValue`
+        //
+        // 2. confirm that
+        //    - the descriptor type is DEVICE, i.e. of value 1 and
+        //    - the descriptor index is 0 (i.e. it is the first implemented descriptor for this type) and
+        //    - `wIndex` is 0 (i.e. no language ID since it's not a string descriptor)
+        //
+        // For more details, see https://embedded-trainings.ferrous-systems.com/setup-stage.html
 
         if bmrequesttype == 0b00000000 && brequest == SET_ADDRESS {
             // Set the device address for all future accesses.