Contact less card Proximity card (Clamshell card, EM thick card) Frequency: 125KHz Read only Unique number Thickness: 1.2mm Weight: 8.5g --------------------------------------------------------------- EM card EM card (EM4100, 4102, TK4100, etc.) Frequency: 125KHz Frequency: 125KHz Read only Read only Unique number Unique number Thickness: 1.2mm Thickness: 0.8mm Weight: 7.5g Weight: 6g --------------------------------------------------------------- T5557 card Private logic protection Writing times: 100,000 times Min writing time: 100MS Three-time mutual acceptance Data storage: 10 years --------------------------------------------------------------- Mifare S50 1K card Mifare S70 4K card Frequency: 13.56MHz Frequency: 13.56MHz Read and write Read and write 1K memory 4K memory Thickness: 0.8mm Thickness: 0.8mm Weight: 6g Weight: 6g Simens 4442 card Intelligent with writing protection Data storage: 10 years Byte protection, private code, communication code Writing times: 100,000times Min writing time: 5MS 300Oe 2750Oe 4000Oe --------------------------------------------------------------- Other cards Common blank cards