# Types of RFID Cards RFID cards are widely used in various applications, from access control to payment systems. In my personal experience working with security systems, I've handled numerous types of RFID cards, each with unique features. I've found that understanding their differences is crucial for selecting the right card for a specific need. My skill in testing and programming these cards has allowed me to identify the best options for different projects. ## **Active RFID Cards** Active RFID cards contain a battery that powers the tag's transmissions. They have a longer read range, often up to 100 meters or more. I recall using active cards in large warehouse tracking systems, where their extended range was essential. In my view, they are ideal for real-time location tracking but are more expensive and have a limited lifespan due to the battery. ## **Passive RFID Cards** Passive RFID cards do not have a battery; they are powered by the reader's electromagnetic field. They are cheaper and have a virtually unlimited lifespan. From my testing, I've seen that most access control cards are passive, with a typical read range of up to 10 meters. I believe they are perfect for high-volume applications like employee badges or public transit cards. ## **Low-Frequency (LF) RFID Cards** Operating at 125-134 kHz, LF RFID cards have a short read range (up to 10 cm) but are effective near metal or liquids. I once used an LF card for animal identification in a veterinary charity project, and it performed reliably despite challenging conditions. For entertainment, LF cards are popular in interactive museum exhibits where close proximity is required. ## **High-Frequency (HF) RFID Cards** HF RFID cards operate at 13.56 MHz and are common in access control, payment, and data transfer applications. They have a read range of up to 1 meter. My experience with HF cards includes integrating them into library systems for book tracking. I think their balance of range and data capacity makes them versatile. TIANJUN provides HF RFID cards that are compatible with most standard readers, ensuring seamless integration. ## **Ultra-High-Frequency (UHF) RFID Cards** UHF RFID cards operate at 860-960 MHz and offer a longer read range (up to 12 meters). I've deployed UHF cards in retail inventory management, where quick scanning of multip