... :125KHz, 13.56MHz 3.Many models can be chose RFID Wrist Band 1. Material: Silicone2. Out diameter: 58mm, 67mm, 75mm3. ... . It's widely used in very humid environment, such as swimming pool , cooling library ,waterproof patrol , field operations, also can work ... contactless chip, low frequencey(125KHz) andhigh frequency(13.56MHz)7. RFID chips:EM4100,EM4102,EM4450,TK4100,T5557,Hitag1,Hitag2,HitagS,Mifare1 ...