diff --git a/SD_ROOT/wz_mini/etc/crontab/root b/SD_ROOT/wz_mini/etc/crontab/root
index 97fbd26..4c955c6 100644
--- a/SD_ROOT/wz_mini/etc/crontab/root
+++ b/SD_ROOT/wz_mini/etc/crontab/root
@@ -1,2 +1,10 @@
-#Enter a crotab as shown below. Example job below can reboot the camera daily at 1:45 AM.
+
+# Example of job definition:
+# .---------------- minute (0 - 59)
+# |  .------------- hour (0 - 23)
+# |  |  .---------- day of month (1 - 31)
+# |  |  |  .------- month (1 - 12) OR jan,feb,mar,apr ...
+# |  |  |  |  .---- day of week (0 - 6) (Sunday=0 or 7) OR sun,mon,tue,wed,thu,fri,sat
+# |  |  |  |  |
+# *  *  *  *  * user-name command to be executed
 #45 05 * * * /sbin/reboot