1. LF 125 kHz, HF 13.56 MHz available; 2. Humanistic design for men and women ... waterproof & harsh resistant4. Chip: 125 KHz (EM4200, EM4305, TK4100, T5557);13.56MHz( Mifare s50, Mifare s70, Mifare Ultralight, Mifare DESFire 4K, ICODE ... . Or per customer's requirement RFID silicone wristband, 125 KHz/ 13.56 MHz