RFID (Radio Frequency Identification) technology is a wireless communication technology that can be used to identify and track objects using radio frequency identification tags. RFID card is one of the common application forms, which uses RFID technology to store and transmit data. The following are the applications and benefits of RFID cards:

1. Logistics and inventory management: RFID cards can be used in logistics and inventory management systems to identify items and products through tags, improving the efficiency of logistics processes. It can automatically identify and track the location, quantity, and status of goods, achieve real-time information management, and reduce manual recording and errors.

2. Access and security control: RFID cards can be used as authentication tools for access control systems. By programming cards with specific identities or permissions, only authorized card holders can access specific areas. This enhances security and prevents unauthorized personnel from entering restricted areas.

3. Payment and ticketing system: RFID cards can be used for cashless payments and electronic ticketing systems. Users can associate their cards with bank accounts or other payment methods and use RFID cards to make payments in stores, restaurants, or public transportation systems. It provides a fast and convenient payment method, reducing cash transactions and queuing time.

4. Personal identification and identity management: RFID cards can be used for personal identification and identity management. For example, companies can store employees' identity information in RFID cards and verify their identity and permissions by reading the cards. This can reduce the workload of the human resources department and improve the accuracy of employee identity verification.

5. Asset tracking and management: RFID cards can be used to track and manage assets such as equipment, tools, library books, etc. By attaching RFID tags to assets, the location and status of assets can be accurately recorded. This can quickly locate and manage assets, reducing losses and errors.

The benefits of RFID cards include improving work efficiency, reducing human errors, enhancing security, simplifying payment processes, and providing fast identification and tracking. It has a wide range of applications in multiple fields and is gradually becoming an important technology in the modern era of the Internet of Things.