diff --git a/Access-point-pinouts.md b/Access-point-pinouts.md
index 2430297..b2e71a1 100644
--- a/Access-point-pinouts.md
+++ b/Access-point-pinouts.md
@@ -52,6 +52,9 @@ See [[Yellow-AP-with-EByte-CC1101-module]] for details.
 
 There are various CC1101 module with differing pinouts available from the "usual places".
 
+**NB: When sourcing a generic module make sure it is the 868/915Mhz version NOT the 433 Mhz version.** <br>
+The two modules are identical other than component values which are unmarked.
+
 It is **STRONGLY** recommended that you verify the connections to the CC1101 pins rather
 than making any assumptions.