【CUID Gen2 / 13.56MHz / Mifare Classic Compatible】 This is a tag that supports UID rewriting and card duplication. It is intended for use with Android (NFC function) using a dedicated app. ⚠️Cannot be read or written to with iPhones. ⚠️Please purchase only if you understand the intended use. Set of 5 (unused) Thin sticker type. - Type: Sticker - Quantity: 50 sheets - Design: Round - Uses: NFC tag duplication, alternative tags for gates and locks, rewriting of custom data Thank you for viewing.