The 125KHz Reader Writer Duplicator Copier, EM4100, is an indispensable smart card copier for versatile frequency readers and writers. This all-in-one device provides the perfect solution for copying, reading, and programming multiple frequency smart cards. The EM4100's ability to handle various frequencies ensures compatibility with different types of smart cards, making it a versatile tool for various industries such as government, finance, and transportation. With 6pcs writable cards included, users can easily store, manage, and share information securely and efficiently. The smart card copiers' smartcard programming feature allows for quick and easy setup, ensuring a seamless workflow. Overall, the EM4100 is a reliable and efficient tool that enhances productivity and data security in its application.