ISO14443A Ultralight EV1 13.56MHz RFID Silicone Bracelet Watch Clasp is made of silcone material and Ultralight®EV1 rfid chips with metal watch clasp . It widely uses for swimming pool management ,event tickets ,door control access , cashless payment ,social networking ,transportation , etc . Metal watch clasp structure can be adjustable according to different people wrist's size ,e-co friendly silicone material and non-toxic ,non-irritating odor and bear higher temperature out-door. Customized logo printing , serial number , barcode and encoding are available .