diff --git a/Sonoff-4CH-and-4CH-Pro.md b/Sonoff-4CH-and-4CH-Pro.md
index 7fe8b598..645f1ed4 100644
--- a/Sonoff-4CH-and-4CH-Pro.md
+++ b/Sonoff-4CH-and-4CH-Pro.md
@@ -51,10 +51,10 @@ On the R2 module the GPIO0 pin is broken out to [a small pad to the right of the
 
 ## Solving Sonoff 4CH Pro programing issues
 
-If you have problems to program the 4CH-pro, you might find below tips useful:
+If you have problems to program the 4CH Pro, you might find below tips useful:
 * Use the ESP program header and ensure that the right port is set in the Arduino IDE. 
 * TX/RX are printed correctly on the pro version => TX goes to RX PIN and RX to TX.
-* GP0 needs to be connected to ground 3 seconds after reboot !!! If not you can not program it.
+* GPIO0 needs to be connected to ground for 3 seconds after reboot! If not you can not program it.
 
 1. If you use Windows7+, check in the device manager if the port is not added/removed all 2 seconds.
    - If yes then your USB port does not deliver enough ampere.