Waterproof and oil-resistant, with long-lasting induction for fast and accurate reading and writing within 0-10 cm. The circular label is made of environmentally friendly PET material, with a smooth, wear-resistant, and glossy surface. The stickers have strong adhesion and are easy to apply to most surfaces. (Not suitable for metal surfaces or strong magnetic fields.) Specifications: Chip protocol: ISO/IEC 14443 Chip model: D213 Storage/User Memory: 180B/144B Antenna size: 25mm Operating frequency: 13.56MHz Scratch resistance: 100,000 cycles Sensing distance: up to 10cm Fixation method: Adhesive backing for secure attachment Applications: Patrol tags, identity recognition, anti-counterfeiting traceability, mobile sensor payment. Color: As shown Material: PET Note: Due to differences in manufacturing batches, variations in appearance, color, and printed text may occur but do not affect functionality. Package Contents: 50 x Label Sticker Lighting and display settings may cause slight color differences between the image and the actual item. Measurement may vary by +/- 1-3cm.