... : blue, red, black, etc. Waterproof rfid wristband made of silicone material IC Options of RFID Wristband1) LF (125KHz): EM4100,EM4200,T5577 ... GEN2,ALIEN H3,IMPINJ M4, etc.Specifications of RFID Wristband1) Material: silicone2) Dimensions: watch dial—oval; inside diameter--74mm; band width ...