Card readers play a crucial role in limiting and monitoring building and perimeter access. By requiring individuals to present an authorized access card to gain entry, card readers ensure that only approved individuals can enter secure areas. This not only enhances the overall security of the facility but also helps prevent unauthorized entry, trespassing, and potential threats. Moreover, card readers provide a way to monitor access by recording and logging each entry and exit. These records can be invaluable in investigations, audits, and security reviews. With card readers in place, organizations can effectively control access, maintain a safer environment, and have a clear record of who enters and exits their premises.