1.Rfid Silicone Wristbands 2.Frequency:125 KHz,13.56 MHz 3.Customized ... temperature: -25 ° C~ + 70 ° C Introduction To Silica gel wrist watch card:(1) Features: waterproof, moistureproof, shock; And high temperature resistant ... (125 KHz) high frequency chip (13.56 MHz) encapsulates the watch.(5) The chip: EM4200, EM4305, TK4100, T5557, Mifare1 S50, Mifare1 ...