diff --git a/README.md b/README.md
index 59b17d2..066deb9 100644
--- a/README.md
+++ b/README.md
@@ -1,17 +1,7 @@
-This is the source code of the MMDVM firmware that supports D-Star, DMR,
-System Fusion, P25, NXDN, POCSAG, and FM modes.
+This is the source code of the MMDVM firmware that supports D-Star, DMR, System Fusion, P25, NXDN, M17, POCSAG, AX.25, and FM modes.
 
-It runs on the Arduino Due, the ST-Micro STM32F1xxx, STM32F4xxx and STM32F7xxx
-processors, as well as the Teensy 3.1/3.2/3.5/3.6. What these platforms have in
-common is the use of an ARM Cortex-M3, M4, or M7 processors with a clock speed
-greater than 70 MHz, and access to at least one analogue to digital converter
-and one digital to analogue converter.
+It runs on the Arduino Due, the ST-Micro STM32F1xxx, STM32F4xxx and STM32F7xxx processors, as well as the Teensy 3.1/3.2/3.5/3.6. What these platforms have in common is the use of an ARM Cortex-M3, M4, or M7 processors with a minimum clock speed greater of 70 MHz, and access to at least one analogue to digital converter, one digital to analogue converter, as well as a number of GPIO pins.
 
-In order to build this software for the Arduino Due, you will need to edit a
-file within the Arduino GUI and that is detailed in the BUILD.txt file. The
-STM32 support is being supplied via the ARM GCC compiler. The Teensy support
-uses Teensyduino.
+In order to build this software for the Arduino Due, you will need to edit a file within the Arduino GUI and that is detailed in the BUILD.txt file. The STM32 support is supplied via the ARM GCC compiler. The Teensy support uses Teensyduino.
 
-This software is licenced under the GPL v2 and is intended for amateur and
-educational use only. Use of this software for commercial purposes is strictly
-forbidden.
+This software is licenced under the GPL v2 and is intended for amateur and educational use only. Use of this software for commercial purposes is strictly forbidden.