This kit assumes the AlarmAgent has not been shipped to the customer and is the Indoor Enclosure model.  The cabinet mount Digital RM3 N antenna option is suggested when the AlarmAgent WRTU is not mounted inside a cabinet. This option includes: Digital RM3 N Female Omni-Directional, tamper resistant antenna and all necessary hardware to remotely mount the antenna up to 10' from the AlarmAgent WRTU. Requires a 5/8' diameter hole for antenna connector.