... different RFID applications.We accept the OEM manufacturing of the tag, and we provide our partners the different customization technics ... are you more technical information for RFID Key Tag RFID key chain Tag IC feature-125KHZ chips: EM4102,EM4200,EM4550,T5577 ... ,Mifare 4k,Mifare ultralight, I-CODE SLI RFID key chain Tag Feature- ROHS certificated.- Housing: ABS, Polycarbonate(PC), Ultrasonic plastic ...