... :Read/Write 3.Contactless tag,Proximity tag Waterproof Silicon RFID Wristbands Material :100%,silicon Size : 45*14cmColor:blue,red,black ... ,colosed-loop wristband,elastic, easy to carry ,waterproof,moistureproof,shockproof,High temperature resistant2,Low frequency chip available(125KHz) ... :TK4100,EM4102,EM4200,T5577 etc3,High frequency chip available(13.56MHz):FM11RF08,Mifare1 S50, ...