diff --git a/examples/minimumsample/minimumsample.ino b/examples/minimumsample/minimumsample.ino
index dc72a2f..d1ca7ba 100644
--- a/examples/minimumsample/minimumsample.ino
+++ b/examples/minimumsample/minimumsample.ino
@@ -15,7 +15,7 @@ void setup() {
 
   // JJY Library
   jjy.begin(); // Start JJY Receive
-  jjy.freq(40); // Set frequency 40kHz
+  //jjy.freq(40); // Set frequency 40kHz if SEL pin connected.
 
   //while(jjy.getTime() == -1) delay(1000); // blocking until time available.
 }