Brand:Sonoff
Chip Feature 215 chip has 540 bytes of larger capacity, and can be read and written more than 10,000 times. WIDE Compatible Compatible with NFC mobile phones (iOS 13 and above, Android with NFC technology). Metal Constant CapacityBuilt-in anti-metal layer for use on metal surfaces. Glossy finish laminated white PVC cards and waterproof PVC material, effectively protect the NFC chip inside. Easy to Use Touch the NFC tag with your phone to turn your phone into smart devices with ease. Convenient You can carry it with ease and use it anywhere, or stick it on the wall or on the desk.