diff --git a/GPIO-Locations.md b/GPIO-Locations.md
index 8eedcecc..4ef5e2c1 100644
--- a/GPIO-Locations.md
+++ b/GPIO-Locations.md
@@ -12,6 +12,8 @@
 <img alt="TH GPIOs" src="http://tinkerman.cat/wp-content/uploads/2016/10/20161004_220416_LABELSs.jpg"/><br/>
 
 # Sonoff Dual
+GPIO4 => red)
+GPIO14 => orange
 <img alt="DUAL GPIOs" src="https://user-images.githubusercontent.com/659660/29748261-f01f466e-8b12-11e7-9280-cc81f876405d.jpeg"/><br/>
 
 # Breakout direct from the chip