Welcome to the shop! Multifunctional: This handheld RFID writer can copy IDTK4100 cards and penetrate certain firewalls. Professional Design: The 125KHZ RFID card copier uses an excellent program algorithm and circuit design, reducing product power consumption and extending battery life. Easy to Use: This handheld RFID card copier is designed with a read button and a write button, making it easy to operate. Practical: The 125KHz RFID ID card writer easily solves the problems of too few cards, lost cards, and replacement cards – all you need is one machine. 125kHz Frequency: The frequency of this RFID ID card writer is 125KHz, and it's small, lightweight, and convenient to carry and use. Item Type: Handheld RFID Card Copier Material: Plastic Includes: 1 x Handheld RFID Card Copier, 6 x RFID Cards, 6 x Remote Controls Your 100% satisfaction is our top priority. We are committed to providing you with the best service. If you encounter any issues after receiving the product, such as damage or incorrect quantity, please contact us immediately, and we will provide you with the best solution!