Simple operation: the process is simple, just hover the phone on the 215 coin tag, and the data will be entered into your phone, no energy, battery or manual pairing is required, easy to use. Small size and small material: The circular NFC sticker has a diameter of 25mm, is small and portable, fits a white PVC card, and has a shiny surface and a waterproof pvc material to effectively protect the NFC chip inside. Wide range of applications: pvc NFC stickers can be used in outdoor smart advertising, mobile phone matching labels, WiFi matching, electronic label shelves and business cards, etc. 30 pieces for NFC round cards, rewritable NFC sticker tags compatible with for tagMo and for , 504 bytes of memory are fully programmable for devices that support NFC Readable card:Due to its readable and writable characteristics, NFC sticker tags allow people to change and read data at any time, and the internal chip can quickly read data. Please note that devices that support NFC are required. suitable occasion:You can use the blank card to set alarms, turn on and off WiFi, make calls, start applications, join networks, display messages, share contacts, display addresses or locations, update social media, open web pages, etc. Colour:White Material:PVC Package Contents: 30 * 25mm chip Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.