... 13.56MHz 3)Waterproof,acid resistant,alkali proof WR8860 silicone wristbandFeatures :1) material : silicone 2) Waterproof , acid resistant , alkali proof , oxidation ... 13.56MHz, 2048bit, R/W) Specifications : 1) Reading distance : 60mm(based on H4102 chip, with EM9917 reader)2) Operating temperature : - 40 ... , etcb. Membership rental management , such as yachting , sports , etc silicone RFID wristband