silicon wristband 1.Oval dial, Waterproof 2.inside diameter--74mm OR 65mm ... :blue, red, black, etc. 4.Fast delivery Waterproof silicon wristband with high quality from China IC Options of RFID Wristband1) LF (125KHz): EM4100 ... wear and use, waterproof, moisture proof, shockproof, and resistant to high temperature2) Working temperature: -50°C~240°CPrinting OptionsLogo printing, character ...