diff --git a/README.md b/README.md
index d3eb086b..dd979330 100755
--- a/README.md
+++ b/README.md
@@ -75,7 +75,7 @@ For checkout time and checkout alert time
   * you can add multiple record for checkout time and checkout alert time
   * type must be 'checkout_time' and 'checkout_alert_time'
   * you can change name and value
-  * name must be time range [8:30 AM - 1:45 PM]
+  * name must be time range [12hr => 8:30 AM - 1:45 PM, 24hr => 8:00 - 13:45]
   * value must be minutes[60]
 
 For call waiter pdf