Fan-Tastic Vent 807359 Pop 'N Lock Screen Upgrade Kit -  7350 UPGRADE - This kit allows you to upgrade your existing Fan-Tastic Vent to a model 7350. ADDITIONAL FEATURES - Includes new interior assembly, Pop N Lock Screen, and pre-wired reverse airflow switch. AUTOMATIC LIFT - Automatic lift system with up/down switch. RAIN SENSOR - Automatic dome closing rain sensor. ALL INCLUSIVE - Comes with hand-held remote and two AA batteries.