... :Read/Write 3.Contactless tag,Proximity tag 125Mhz Silicon RFID Wristband Material :100%,silicon Size : 45*14cmColor:blue,red,black ,white ... ,yellow ,gray,pink,green,ect Feture1,colosed-loop wristband,elastic, easy to carry ,waterproof ... chip available(13.56MHz):FM11RF08,Mifare1 S50,Mifare1 S70,Mifare Ultralight,I-CODE2,TI2048,SRI512 , ect4,UHF chip ...