CANT Write HID Card If read/ write fails, please try a few more times. If you think the product is not suitable for you,please do not buy it. Please watch the details and videos before buying,Thanks How to Crack encryption 13.56Mhz cards: Please read it carefully and follow the steps as below: When the 13.56mhz cards have encrypted,it should be using the software to crack the cards. Conneted with copier with computer via USB cable, then Press the "on/off" button, then the copier will be show the "Disclaimer"page, NOT press any button on the Copier, then your computer will show a removeable disk, open the disk, there are the manual and the software, Press the button "OK" to agree with the Disclaimer on the computer fistly, then argee with the copier's "Disclaimer"page, that's will be connect successfully, put your original cards on the back side of the Read/Write area, then press the button "scan"to crack the passwords, after 5 or 10 seconds,the passwords will be cracked successfully, then put one UID cards in the read/write area, then press"write“button, that will be ok. How to copy the 125khz RFID cards: Press the "on/off "button, put the original 125khz cards on the back of the copier, then the copier will be show the "Disclaimer"page, Press "ok" button, then put the cards on the back side of the copier, then press"scan", then the copier will auto scan it is 125khz cards, and the copier will show the card number, then we put one writable EM4305 key on the back side of the copier, then press"Write", then that will be write succesfully. Package include: 1pc Handheld RFID NFC Copier Reader Writer 1pc USB cable 10pcs UID Keyfob/CardsSupports reading and writing frequency: 125KHz, 250KHz, 500KHz, 375KHz,625khz, 750kHz, 875KHz, 1000KHZ, 13.56MHz (ISO14443A/B). Does not carry any virus, please rest assured to exit the anti-virus software when using it. Not support HID CARD. Supports card writing: T5577, EM4305, M-fre UID cards. HD 3.2-inch full color screen.ID/IC full hand, English voice broadcast.