Product DescriptionsThe 5pcs UID key fobs are working with 13.56MHz frequency, used to copy the Mi-fare 1k card.The 5pcs T5577 cards are working with 125KHz frequency, used to copy the EM4100, TK4100 cards. They are different types of cards. These 5pcs white cards are T5577 (EM4305) type, they have no data before written. They can be read successfully after finish written from your cards. This product has USB interface, you can use the USB line as the power line. Also working with 4xAAA battery, standard handset, easy to carry (batteries are not included in the package). About the software, you can connect this device with your computer, then you can find a U disk displayed on your computer, open it and click the file inside to install the software on your computer.(Sometimes the U disk cannot be displayed in one attempt, please re-connect again, If you still can not find the software, just contact me for a software link.) How to read and write normal RFID cards First of all, you should know that some of key cards can only be duplicated, not writable, such as EM4100 card, etc.1. Press the inchon/off inch button. 2. The copier will show the inchWaringinch page. Press inchOKinch. 3. Put the cards on the back side of the copier and press inchscaninch . 4. The copier will scan and show the card number. 5. Put one writable T5577(125khz writable chip) or UID(13.56mhz writable chip) card on the back side of the copier and press inchWriteinch. How to crack encrypted 13.56Mhz cardsYou need to connect this device with your computer and use software to decode it. (not all encrypted cards compatible) 1. Open the software then connect the device to this software 2. Choose the HF Card Mode and click 'Start Decodinginch(This may cost a few minutes) 3.After decoding, you can click 'Write Cardinch to copy this encrypted data to our writable UID fobs.