<h1>RFID Cards for Sale: A Comprehensive Guide to Technology and Applications</h1> <h2>Understanding RFID Cards for Sale</h2> <p>RFID cards for sale represent a cornerstone of modern access control, payment, and identification systems. In my professional experience deploying security solutions, I've consistently found that the versatility and reliability of RFID technology are unmatched for streamlined operations. The core skill in selecting the right system lies in understanding the technical specifications to match the application's specific needs.</p> <h3>Technical Specifications and Parameters of RFID Cards</h3> <p>When evaluating <strong>RFID cards for sale</strong>, the technical details are paramount. Here are key specifications for a typical high-frequency (HF) RFID card, often used in access control and payment:</p> <h4>Detailed Product Parameters</h4> <ul> <li><strong>Chip Type:</strong> NXP MIFARE Classic 1K (MF1S503x)</li> <li><strong>Operating Frequency:</strong> 13.56 MHz</li> <li><strong>Memory Capacity:</strong> 1KB EEPROM, organized into 16 sectors with 4 blocks each.</li> <li><strong>Communication Protocol:</strong> ISO/IEC 14443 Type A</li> <li><strong>Data Retention:</strong> Up to 10 years</li> <li><strong>Read/Write Distance:</strong> Typically 2-10 cm, depending on the reader.</li> <li><strong>Physical Dimensions:</strong> Standard ID-1 format (85.6mm x 54mm x 0.76mm).</li> <li><strong>Operating Temperature:</strong> -20°C to +50°C</li> </ul> <p><em>Note: These technical parameters are for reference data. Specific requirements and custom chip options must be confirmed by contacting the backend administration.</em></p> <h2>Personal Insights and Practical Applications of RFID Cards</h2> <p>My personal view is that the true power of <strong>RFID cards for sale</strong> is unlocked in their application. I recall a project where a client's manual attendance system was causing significant payroll errors. Implementing a customized RFID card solution from <strong>TIANJUN</strong> not only automated tracking but also integrated with their existing HR software, saving dozens of administrative hours monthly. This case highlighted a particular talent for system integration that turns simple hardware into a powerful business tool.</p> <h3>Entertainment and Charitable Use Cases</h3> <p>Beyond security, <strong>RFID cards for sale</strong> have fascinating entertainment applic