Card-tech Handheld 125khz Rfid ID card Reader/Duplicator, support Read ID EM4100 cards/tags or compatible cards/tags Copy the read data to a writable card EM4305 / T5577(Not Support HID Card Copier) The Card-tech Handheld 125khz Rfid Duplicator ,it can read EM4100,EM4200,Tk4100 chip cards and can use EM4305/T5577 card to copy their data,after copy,the device can read EM4305/T5577 card ,it can using for access control management.it is very easy to operate. Package Includes1 Read Only Card4100+5 Writable KeysEM4305 Before operation, we have to know that EM4100/4200 chip is only readable but not writable. Each EM4100/4200 card or key ring has an independent serial number (UID), the series number is written into the chip before packaging which cannot be modified. However, encryption processing can be done for them by virtue of software operation. And EM4305 and T5577 are in possession of read-write function. It applies to access control, hotel locks, staff attendance and school campus access and payment control, identification and security systems, parking lot entry and payment, social security management, transportation payment, municipal and ancillary service payment. This duplicator can read serial number (UID) in EM4100/4200 key ring/card not encrypted, and write the read serial number (UID) into T5577/EM4305 key ring/card. Thus one or several key rings/cards with completely same serial number can be gotten.