diff --git a/docs/VTX.md b/docs/VTX.md
index ec7bc6cfd..2dc9b1f3c 100644
--- a/docs/VTX.md
+++ b/docs/VTX.md
@@ -1,13 +1,41 @@
 # VTX
 
-Cleanflight supports control of VTX modules.  Some boards like the SPRacingF3NEO have both a VTX module and a button connected to the CPU to allow the user to change channel, band, rf power, etc.
+Cleanflight supports control of VTX modules.  
 
-## VTX Button usage
+## VTX Systems
+
+Current support includes 
+1. RTC6705 directly connected to the CPU (maybe via a PCB board interconnect, e.g. SPRACINGF3NEO)
+2. IRC Tramp
+3. TBS Smart Audio
+
+## VTX Button
+
+If your FC has a button, excluding a BOOT buttons, then it can be used for VTX control.
+
+Some boards like the SPRacingF3NEO have both a VTX module and a button.
+Other boards like the SPRacingF3MINI have multiple buttons.
+
+### VTX Button usage
 
 While the VTX button is held the STATUS 2 LED will flash N times per second indicating the action that will be taken when the button is released. The flashing starts as soon as the button is held. e.g. You press the button, count flashes and then release as appropriate.
 
-* 25ms to 1s - Cycle Channel 1-8 - 5 flashes.
-* 1s to 3s - Band 1-5 - 4 flashes.
-* 3s to 5s - Cycle RF Power - 3 flashes.
-* 5s to 10s - Enable/Disable VTX - 2 flashes.
-* 10s or more - Save settings - If VTX is currently ON then it will be ON on next boot. If it's currently OFF then it will be OFF at the next boot. - 1 flash.
+| Duration      | Function                  | Flashes   |
+|---------------|---------------------------|-----------|
+| 25ms to 1s    | Cycle Channel             | 4         |
+| 1s to 3s      | Cycle Band                | 3         |
+| 3s to 5s      | Cycle Power and RF Power  | 2         |
+| 5s or more    | Save FC settings          | 1         |
+
+Example to cycle VTX power
+```
+0 seconds       | 1 second      | 2 seconds     | 3 seconds     | 4 seconds     | 5 seconds     | 6 seconds or more |
+[-HOLD BUTTON-----------------------------------|-RELEASE BUTTON-NOW------------|-RELEASED TO LATE TO CHANGE POWER -|
+| 4 Flashes     | 3 flashes     | 3 flashes     | 2 flashes     | 2 flashes     | 1 flash       | 1 flash           |
+```
+
+The VTX button works with ALL VTX systems including onboard RTC6705, Tramp and SmartAudio.
+
+
+If the VTX can be turned off then POWER 0 will turn off the VTX and POWER 1 will set the VTX into it's lowest power output.
+If the VTX cannot be turned off then POWER 0 will set the VTX into it's lowest power output.