diff --git a/20-hw1.rules b/20-hw1.rules
index 5928fd4..dd3ac59 100644
--- a/20-hw1.rules
+++ b/20-hw1.rules
@@ -1,3 +1,14 @@
+# Ledger device udev rules
+#
+# You may need to place this file in /etc/udev/rules.d/ and then run
+# `udevadm control --reload` to enable non-root access to Ledger USB devices.
+#
+# Product identifiers are built using a 1-byte prefix corresponding to the device
+# then 3-bytes to identify which USB interface are activated by current device
+# application. For example "5011" corresponds to Nano S Plus with only WebUSB
+# activated.
+# Legacy product identifiers are "000[1-5]".
+
 # HW.1 / Nano
 SUBSYSTEMS=="usb", ATTRS{idVendor}=="2581", ATTRS{idProduct}=="1b7c|2b7c|3b7c|4b7c", TAG+="uaccess", TAG+="udev-acl"
 # Blue
@@ -10,5 +21,5 @@ SUBSYSTEMS=="usb", ATTRS{idVendor}=="2c97", ATTRS{idProduct}=="0002|2000|2001|20
 SUBSYSTEMS=="usb", ATTRS{idVendor}=="2c97", ATTRS{idProduct}=="0003|3000|3001|3002|3003|3004|3005|3006|3007|3008|3009|300a|300b|300c|300d|300e|300f|3010|3011|3012|3013|3014|3015|3016|3017|3018|3019|301a|301b|301c|301d|301e|301f", TAG+="uaccess", TAG+="udev-acl"
 # Nano X
 SUBSYSTEMS=="usb", ATTRS{idVendor}=="2c97", ATTRS{idProduct}=="0004|4000|4001|4002|4003|4004|4005|4006|4007|4008|4009|400a|400b|400c|400d|400e|400f|4010|4011|4012|4013|4014|4015|4016|4017|4018|4019|401a|401b|401c|401d|401e|401f", TAG+="uaccess", TAG+="udev-acl"
-# Ledger Test
-SUBSYSTEMS=="usb", ATTRS{idVendor}=="2c97", ATTRS{idProduct}=="0005|5000|5001|5002|5003|5004|5005|5006|5007|5008|5009|500a|500b|500c|500d|500e|500f|5010|5011|5012|5013|5014|5015|5016|5017|5018|5019|501a|501b|501c|501d|501e|501f", TAG+="uaccess", TAG+="udev-acl"
\ No newline at end of file
+# Nano S Plus
+SUBSYSTEMS=="usb", ATTRS{idVendor}=="2c97", ATTRS{idProduct}=="0005|5000|5001|5002|5003|5004|5005|5006|5007|5008|5009|500a|500b|500c|500d|500e|500f|5010|5011|5012|5013|5014|5015|5016|5017|5018|5019|501a|501b|501c|501d|501e|501f", TAG+="uaccess", TAG+="udev-acl"
diff --git a/add_udev_rules.sh b/add_udev_rules.sh
index db5fae1..6da0174 100755
--- a/add_udev_rules.sh
+++ b/add_udev_rules.sh
@@ -1,5 +1,16 @@
 #!/bin/bash
 cat <<EOF > /etc/udev/rules.d/20-hw1.rules
+# Ledger device udev rules
+#
+# You may need to place this file in /etc/udev/rules.d/ and then run
+# `udevadm control --reload` to enable non-root access to Ledger USB devices.
+#
+# Product identifiers are built using a 1-byte prefix corresponding to the device
+# then 3-bytes to identify which USB interface are activated by current device
+# application. For example "5011" corresponds to Nano S Plus with only WebUSB
+# activated.
+# Legacy product identifiers are "000[1-5]".
+
 # HW.1 / Nano
 SUBSYSTEMS=="usb", ATTRS{idVendor}=="2581", ATTRS{idProduct}=="1b7c|2b7c|3b7c|4b7c", TAG+="uaccess", TAG+="udev-acl"
 # Blue
@@ -12,7 +23,7 @@ SUBSYSTEMS=="usb", ATTRS{idVendor}=="2c97", ATTRS{idProduct}=="0002|2000|2001|20
 SUBSYSTEMS=="usb", ATTRS{idVendor}=="2c97", ATTRS{idProduct}=="0003|3000|3001|3002|3003|3004|3005|3006|3007|3008|3009|300a|300b|300c|300d|300e|300f|3010|3011|3012|3013|3014|3015|3016|3017|3018|3019|301a|301b|301c|301d|301e|301f", TAG+="uaccess", TAG+="udev-acl"
 # Nano X
 SUBSYSTEMS=="usb", ATTRS{idVendor}=="2c97", ATTRS{idProduct}=="0004|4000|4001|4002|4003|4004|4005|4006|4007|4008|4009|400a|400b|400c|400d|400e|400f|4010|4011|4012|4013|4014|4015|4016|4017|4018|4019|401a|401b|401c|401d|401e|401f", TAG+="uaccess", TAG+="udev-acl"
-# Ledger Test
+# Nano S Plus
 SUBSYSTEMS=="usb", ATTRS{idVendor}=="2c97", ATTRS{idProduct}=="0005|5000|5001|5002|5003|5004|5005|5006|5007|5008|5009|500a|500b|500c|500d|500e|500f|5010|5011|5012|5013|5014|5015|5016|5017|5018|5019|501a|501b|501c|501d|501e|501f", TAG+="uaccess", TAG+="udev-acl"
 EOF