diff --git a/led-badge-11x44.py b/led-badge-11x44.py
index 3816cac..adb006d 100755
--- a/led-badge-11x44.py
+++ b/led-badge-11x44.py
@@ -7,12 +7,13 @@
 # The font_11x44[] data was downloaded from such a device.
 #
 # Requires:
-#  sudo apt-get install python3-evdev
+#  sudo apt-get install python3-usb
 
 import sys, os, array, time
 import usb.core
 
 font_11x44 = (
+  # 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
   0x00, 0x38, 0x6c, 0xc6, 0xc6, 0xfe, 0xc6, 0xc6, 0xc6, 0xc6, 0x00,
   0x00, 0xfc, 0x66, 0x66, 0x66, 0x7c, 0x66, 0x66, 0x66, 0xfc, 0x00,
   0x00, 0x7c, 0xc6, 0xc6, 0xc0, 0xc0, 0xc0, 0xc6, 0xc6, 0x7c, 0x00,
@@ -40,6 +41,7 @@ font_11x44 = (
   0x00, 0x66, 0x66, 0x66, 0x66, 0x3c, 0x18, 0x18, 0x18, 0x3c, 0x00,
   0x00, 0xfe, 0xc6, 0x86, 0x0c, 0x18, 0x30, 0x62, 0xc6, 0xfe, 0x00,
 
+  # 'abcdefghijklmnopqrstuvwxyz'
   0x00, 0x00, 0x00, 0x00, 0x78, 0x0c, 0x7c, 0xcc, 0xcc, 0x76, 0x00,
   0x00, 0xe0, 0x60, 0x60, 0x7c, 0x66, 0x66, 0x66, 0x66, 0x7c, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x7c, 0xc6, 0xc0, 0xc0, 0xc6, 0x7c, 0x00,
@@ -67,6 +69,7 @@ font_11x44 = (
   0x00, 0x00, 0x00, 0xc6, 0xc6, 0xc6, 0xc6, 0x7e, 0x06, 0x0c, 0xf8,
   0x00, 0x00, 0x00, 0x00, 0xfe, 0x8c, 0x18, 0x30, 0x62, 0xfe, 0x00,
 
+  # '0987654321^ !"\0$%&/()=?` °\\}][{' + "@ ~ |<>,;.:-_#'+* "
   0x00, 0x7c, 0xc6, 0xce, 0xde, 0xf6, 0xe6, 0xc6, 0xc6, 0x7c, 0x00,
   0x00, 0x7c, 0xc6, 0xc6, 0xc6, 0x7e, 0x06, 0x06, 0xc6, 0x7c, 0x00,
   0x00, 0x7c, 0xc6, 0xc6, 0xc6, 0x7c, 0xc6, 0xc6, 0xc6, 0x7c, 0x00,
@@ -98,6 +101,8 @@ font_11x44 = (
   0x00, 0x3c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0x3c, 0x00,
   0x00, 0x3c, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x3c, 0x00,
   0x00, 0x0e, 0x18, 0x18, 0x18, 0x70, 0x18, 0x18, 0x18, 0x0e, 0x00,
+
+  # "@ ~ |<>,;.:-_#'+* "
   0x00, 0x00, 0x3c, 0x42, 0x9d, 0xa5, 0xad, 0xb6, 0x40, 0x3c, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc0, 0xc0, 0x00, 0x00, 0x00,
   0x00, 0x76, 0xdc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
@@ -117,10 +122,10 @@ font_11x44 = (
   0x00, 0x00, 0x00, 0x66, 0x3c, 0xff, 0x3c, 0x66, 0x00, 0x00, 0x00,
   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 
+  # "äöüÄÖÜß"
   0x00, 0xcc, 0xcc, 0x00, 0x78, 0x0c, 0x7c, 0xcc, 0xcc, 0x76, 0x00,
   0x00, 0xc6, 0xc6, 0x00, 0x7c, 0xc6, 0xc6, 0xc6, 0xc6, 0x7c, 0x00,
   0x00, 0xcc, 0xcc, 0x00, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0x76, 0x00,
-
   0xc6, 0xc6, 0x38, 0x6c, 0xc6, 0xfe, 0xc6, 0xc6, 0xc6, 0xc6, 0x00,
   0xc6, 0xc6, 0x00, 0x7c, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0x7c, 0x00,
   0xc6, 0xc6, 0x00, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0xc6, 0x7c, 0x00,