For NFC devices: compatible with TagMo Amiibo, work for Android NFC-enabled cell phones and devices, which bring more conveniences; With this NFC coin card, you can DIY your NFC equipment according different needs; Note: some mobile phone doesn't support third party NFC tools app, it is not NFC cards problem, please understand it clearly before buying Reliable memory capacity: the NFC blank tag uses 215 chip, with 504-byte usable memory, the chip has a read-write lock function that can be repeatedly edited or read-only; Cannot be edited or reset after set as read-only tag; As for Amiibo only can edit once; Suits for long time use Function: these white PVC cards are typically applied for contact information such as giving your contact or business information, and for security, goods and device authentication Quality material: made of waterproof PVC material, can be placed outdoors or near water without the risk of losing functionality, no adhesive, not designed for use on metal surfaces; Designed to work with NFC devices or NFC compliant proximity coupling devices including other NFC-enabled phones and tablets What you get: you will receive 50 pieces 215 NFC coin shape tags, sufficient quantity for your daily needs