Built-in 5 number auto-dialerBuilt-in high resolution color video camera with wide viewing angle tilt/swivel adjustments and wide operating temperature of -30F to 150FAudio and video transmission on one CAT5E cable (page 5)Vandal Resistant Features: 14 gauge louvered stainless steel faceplate with stainless steel speaker/mic screen heavy duty metal Call button impact and scratch resistant camera lens and hex drive mounting screwsWeather Resistant Features: Mylar speaker faceplate gasket mic and speaker