Fangrui Product Details This Is Not A Universal Card, You Must Have The Original Card To Copy!cpu Cards Cannot Be Copied, Room Cards, Financial Cards, And Recharge Cards Cannot Be Copied! With This Device, You Can Create Copies Of Rfid Tags And Cards, Which Can Be Used To Access Secure Areas Or Equipment That Require Rfid Authentication. You Can Also Emulate And Stores Different Types(125khz/13.56mhz) Of Rfid Cards,each Channel Can Store 2. A Total Of 16 Can Be Stored. Card Writing Function: Support Writing Uid Cards, Cuid Cards, Fuid Cards;support Writing Mobile Phone Bracelet Simulation Cards: Support Writing Id5577 Cards. Simulate 8 Pairs Of 1c Cards (or Ntag Game Cards) And 125kid Cards. This Device Is A Valuable Tool For Anyone Working With Rfid Technology, Whether Youre An Engineer, Security Professional, Or Just A Curious Hobbyist. And Thanks To Its Compact And Portable Design, You Can Take It With You Wherever You Go! Working Frequency:125khz /13.56mhz Battery:lithium Battery Power On:automatic Start And Stop. Communic