diff --git a/README b/README
index 38a35bf..698861c 100644
--- a/README
+++ b/README
@@ -49,7 +49,10 @@ watch/clock doesn't have such correction, you can always use this -o flag to
 zero out this offset (with -o 0) and transmit the local time directly onto it.
 In case your equipment, software or time source server introduce any delay to
 the synchronization process, you can add a constant delta (in milliseconds)
-with the -d flag. After the synchronization is successful, you can press the
+with the -d flag. E.g. Citizens tend to lag behind an entire second with my
+equipment (unlike Casios), so the -d 1000 parameter is usually helpful for me.
+
+After the synchronization is successful, you can press the
 Ctrl+C combination or wait until the entire sequence (which is 30 minutes long
 by default, adjustable with -t flag) gets transmitted.