... red, black, etc. Waterproof rfid wristband made of silicone material IC Options of RFID Wristband1) LF (125KHz): EM4100, ... ALIEN H3,IMPINJ M4, etc.Specifications of RFID Wristband1) Material: silicone2) Dimensions: watch dial—oval; inside diameter--74mm ... and resistant to high temperature2) Working temperature: -50°C~240°CPrinting OptionsLogo printing, character printingApplications of RFID Wristband1) ...