You will need a programming module / reader etc. This is just the tag. Sold individually Specifications Card type RFID Tag Operating Frequency 125KHz Material ABS Memory 64 bit Read Range 0 ~5 cm depends on rfid reader Type Chip TK4100 Size 40*31*5MM Work type Read Only, Can not Copy, Write, Re-writable Color Blue Compliance EM4100 Operating Specifications Package: 1Pcs/Lot Can’t been programmed Can’t be compatible with UHF reader and encrypted readers ID Identification Access Control Time Attendance Door Entry