Simple operation: The process is simple—just hover your phone over the NFC tag, and the data will be transferred automatically. No power source, battery, or manual pairing required. Small size and durable design: The circular NFC sticker has a diameter of 25mm, making it compact and portable. It fits standard white PVC cards and features a glossy, waterproof PVC surface that protects the internal NFC chip. Wide range of applications: These PVC NFC stickers can be used for smart advertising, mobile phone pairing, Wi-Fi setup, electronic shelf labels, business cards, and more. Package includes: 30 round NFC stickers (25mm), rewritable NFC tags with 504 bytes of fully programmable memory, compatible with NFC-enabled devices. Readable and rewritable: These NFC sticker tags allow users to read and update data at any time. The internal chip enables fast data reading. Note: An NFC-enabled device is required. Suitable uses: Use the card to set alarms, turn Wi-Fi on or off, make calls, launch apps, connect to networks, display messages, share contacts, show addresses or locations, access social media, open websites, and more. Color: White Material: PVC Package contents: 30 x 25mm NFC stickers Note: Lighting conditions and screen displays may cause slight color variations. Measurement may vary by +/- 1-3cm.