These on metal inlays are tuned slightly below 13.56Mhz so when they are introduced to a metallic environment their frequency shifts closer to 13.56Mhz. We introduce a polymer ferrite material to the base of the inlay to help reduce metal RF interference.
IC: NTAG203 NXP
Size: 20mm x 6mm x 0.9mm
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The new pre order Ceramic Rings are only available on this current store, with worldwide shipping!