rfid bracelet tag competitive price superior quality free testing samples custom rfid bracelet specification Productscustom rfid braceletMaterialsiliconeshaperound, ovalcolorblack, red, green, yellow,white, pink, blue and so ... adult 40diameter childrenfunctionwater-protective; heat resisting; easy to wearchip availableLF: (125KHz): TK4100,EM4200,T5577,Hitag 1,Hitag 2,Hitag S and ...