The package contains high-quality NTAG213 NFC labels with a diameter of 25mm. Waterproof and oil-resistant, these durable labels offer fast and accurate reading and writing within a distance of 0-10cm. The circular label is made of environmentally friendly PET material, with a smooth, wear-resistant, and glossy surface. These round stickers feature strong adhesion and are easy to apply to most surfaces. (Not suitable for use on metal surfaces or in strong magnetic fields.) Chip protocol: ISO/IEC 14443 Chip model: NTAG213 Storage/User memory: 180B/144B Antenna size: 25mm Operating frequency: 13.56MHz Write endurance: 100,000 cycles Sensing distance: up to 10cm Mounting: Adhesive backing for secure attachment Applications: Patrol tags, identity recognition, anti-counterfeiting traceability, mobile sensor payment. Note: Slight variations in appearance, color, and printed characters may occur between batches, but these do not affect functionality. Color: As shown in picture Material: PET Package Contents: 100 x NFC label sticker Only the items listed above are included; other products are not included. Note: Lighting effects and display settings may cause slight color differences between the image and the actual item. Measurement allows an error of +/- 1-3cm.