Welcome! This package includes 20 NFC stickers, round, 40mm/1.57 inches in diameter, with a 125KHz operating frequency and a 0-5cm/0-2in reading distance. Versatile: These NFC stickers are perfect for access control, smart home devices, door locks, business cards, and more – simplifying your work and life. Anti-Interference: The anti-jamming algorithm selects each tag individually, ensuring accurate transactions without interference from other nearby tags. Easy to Use: Easily embed these NFC stickers into products, labels, or everyday electronic devices. Compact Size: The small size allows for discreet placement on the back of phones or other devices without compromising performance. Specifications: Item Type: NFC Stickers Material: PET Operating Frequency: 125KHz Reading Distance: Approx. 0-5 cm/0-2 inches Diameter: Approx. 40 mm/1.57 inches Package Includes: 20 x NFC Stickers Your 100% satisfaction is our top priority. We are committed to providing excellent service. If you encounter any issues after receiving your order, such as damage or incorrect quantity, please contact us immediately for a resolution.