... : 125 kHZ/ 13.56 MHz6.Sense distance:2-15cm7.Sense time:1-2 second8.Available Chips: EM4100,EM4200,EM4305,EM4450,TK4100 ... ,TI2048,Hitag2,Hitags,T5577 and so on.ApplicationPatrol Management System, Time and Attendance Management System, Access Control System ,School All-in-one ... balance before shipment, or2. Paypal 13.56 MHz/ 125 kHz RFID Key tag