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Need you have EM4100 copier or writer,easy write it to EM4100,if you havespecial HID writer/copier can be write it to HID type too,so it can change to different type ,125KHz EM4100 or 125KHz HID,need you have that type copier or writer.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.