RIFD TK4100 Dics supporting the 125KHz standard. This common RFID standard offers some of the lowest cost tags and readers.
This RFID tag uses the TK4100 transponder to provide the reader with a unique ID. The reader will contain a list of the actions that can be taken when this ID is read.
125KHZ: TK4100,EM4200,T5577,EM4305,EM4450 Hitag1/2/S, etc
Read only memory in identify serial number