[Chip Feature] Manufacturing process strictly follows the protocol IEC 50443A. It has 504 bytes of storage capacity and read-write lock function. The reading and writing time requires only 1-2ms. Data can be stored for more than 10 years, with over 100,000 erase and write cycles. [Size and Material] Each card is the size of a credit card. Made of high-quality PVC material, sturdy, waterproof, drop-resistant, and fold-resistant, effectively protecting the internal chip for long-term use. Each NFC card comes in individual packaging. [Blank White NFC Card] The printable surface allows customization according to personal needs. Compatible with most photo ID card printers. Not suitable for inkjet printers. [Compatibility] Compatible with TagMo (Android NFC-enabled smartphones) and Placiibo/Amii/Amii NFC (iOS). Works with all NFC-enabled smartphones and devices. [Wide Application] Suitable for check-in, mobile payment, product information query, mobile identification, mobile marketing, social networking, business card sharing, access control, membership management, book borrowing, and more. Sensing distance: 0–10 cm, depending on device specifications. Quantity: 100 pcs Color: White Material: Plastic Size: 85.5 x 54.5 mm Package Contents: 100 x NFC Cards Note: Light reflection and different displays may cause slight color variation between the image and the actual item. Measurement allows an error of +/- 1–3 cm.