SUPPORT 10 FREQUENCY: ID-125KHz, ID-250KHz, ID-375KHz, ID-500KHz, ID-625KHz, ID-750KHz, ID-875KHz, ID-1000KHZ, IC13.56MHz (ISO1443A/B), HID125kHz Prox cards. NOTE: The software of our machine is ONLY compatible with WINDOWS system, NOT working with MAC system or Linux system; It doesn't work for fully-encrypted cards. By its decoding software, it may work for most half-encrypted cards, BUT NOT ALL. Support read: EM4100/EM4200, Mifare classic, UID cards, Ultralight, Ntag203, 1386/1326/1346; Support cards write: 1386/1326/1346, T5577, EM4305, Mifare UID cards. HOW TO COPY AN UNENCRYPTED CARD: 1.Inserted batteries and powered on 2.PressOK when a disclaimer pops up 3.Inserted card into back elastic 4.Press SCAN or READ 5.Replace a Blank with same frequency of the card you want to copy 6.Press WTIRE HOW TO DECODE A ENCRYPTION CARD: when connect with PC:there is a DISCLAIMER At this time, do not press the "OK" button or any button on the Reader machine. Enter my computer, Find the removable disk and copy software exe that with RED Logo to another flash drive of your PC. Double-click to open the software, it shows USB connecting, and clik the Start on your screen. it will take about 1-3 minutes. When it shows Deconding is succcessful, replace a blank card, then press WRITE to copy it. TIPS:The software for rfid reader is Automatic update ,if no find the update software is NO NEED to update.when the computer recognized as malicious software,it should be exit computer's antivirus software,if not ,the rfid reader's software will be deleted.