Simple operation: The process is simplejust tap your phone on the 215 coin tag, and the data will be transferred to your phone. No power source, battery, or manual pairing is required, making it easy to use. Small size and lightweight: The circular NFC sticker has a diameter of 25mm, is compact and portable, fits on a standard white PVC card, and features a glossy surface with waterproof PVC material to protect the NFC chip inside. Wide range of applications: PVC NFC stickers can be used for smart advertising, mobile phone pairing, WiFi pairing, electronic shelf labels, business cards, and more. Package includes: 30 round NFC stickers, rewritable NFC tags compatible with NFC-enabled devices, each with 504 bytes of memory that is fully programmable. Readable and writable: These NFC sticker tags allow users to read and rewrite data at any time. The internal chip enables fast data reading. Please note that an NFC-enabled device is required. Suitable uses: You can use these tags to set alarms, turn WiFi on/off, make calls, launch apps, connect to networks, display messages, share contacts, share locations, access social media, open websites, and more. Color: White Material: PVC Package Contents: 30 x 25mm NFC stickers Note: Light reflection and differences in display screens may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.