The HID 1435 Flexsmart Mifare adhesive tags are ideal for upgrading standard ID cards into contactless smart cards. These adhesive tags operate at a frequency of 13.56MHz and utilize a 26-bit format. They are designed to stick to any non-metallic surface, such as phone cases or wallets, allowing for access control capabilities.Comes in packs of 100Operates at a frequency of 13.56MHzMeasures 3.26cm in diameter