diff --git a/checks/check_snmp_synology.py b/checks/check_snmp_synology.py
index 3539835..65c321e 100755
--- a/checks/check_snmp_synology.py
+++ b/checks/check_snmp_synology.py
@@ -637,7 +637,7 @@ class SNMPSynologyUPSResource(nagiosplugin.Resource):
         self.session = session
 
     def probe(self) -> list:
-        """check memory usage in %
+        """check ups status
         
         Returns:
             nagiosplugin.Metric: single metric element (return)
@@ -712,6 +712,7 @@ def parse_args() -> argparse.Namespace:
             'raid',
             'raid_space',
             'ups',
+            'smart',
         ],
         help='check mode to run')