WR8860 silicone wristband 1)material:silicone 2)Frequency:125kHz or 13.56MHz 3)Waterproof,acid resistant,alkali proof WR8860 silicone wristbandFeatures :1) material : silicone 2) Waterproof , acid resistant , alkali proof , oxidation proof , Low chemical reactivity, low toxicity3) Frequency : 125kHz or 13.56MHz4) available chips : GK4001 (125KHz, 64bit, R/O) EM4102 (125KHz, 64bit, R/O) I-Code (13 ...