... dust proof 3,different color is adapted..... Guard Patrol RFID key 1,ABS material ;2,water and dust proof3,different color4 ... ,can be printed 1-2 screen color5,Chip is available :I-CODE 2,GEN2,Mifare S50,Mifare S70,Mifare Ultralight ,etc ... ....... the specification of the TK4100 Key fob Specification of the TK4100Memory64bitSecurity featurePassword needed when read or ...