Welcome to the store! 20 PCS Stickers: The package includes 20 NFC stickers, 40mm/1.57in in diameter, 13.56MHz operating frequency, 0‑5cm/0‑2in reading distance. Versatile: NFC stickers have multiple uses, suitable for smart phones and tablets, access control devices, etc. Making life more convenient. Anti Interference: The anti-jamming algorithm selects each tag individually and ensures that the selected tag performs the transaction correctly. Allows multiple tags to work on site simultaneously. Easy to Use: The NFC sticker is light and compact, can be more easily embedded in objects such as product labels or electronic devices. Small Size: Mobile NFC stickers are small and can be attached to the back of your phone or other devices without affecting performance. Item Type: NFC Stickers Material: PET Operating Frequency: 13.56MHz Reading Distance: Approx. 0-5cm/0-2in Working Mode: Read and Write Diameter: Approx. 40mm/1.57in Includes: 20 x NFC Stickers