Yes, you can use multiple cameras on one monitor screen with the Safety Vision system. The system supports up to 64 cameras and allows for simultaneous viewing of all camera feeds without any additional equipment needed. The user friendly interface also makes it easy to switch between views or lock onto a particular view as desired. Additionally, the Safety Vision system provides real-time monitoring of each feed, allowing users to keep tabs on their premises 24/7 from anywhere in the world via an internet connection.