【High-Performance NFC Chip】Features a high-capacity 215 chip (540 bytes storage, 10,000+ read/write cycles) with built-in anti-metal layer and waterproof PVC casing – ensuring reliable performance even on metal surfaces. 【Wide Compatible】Compatible with NFC-enabled phones (iOS 13 and above, Android with NFC technology) 【Easy to Use】Tap the NFC tag with your phone to instantly activate smart devices. Lightweight and portable – stick it on walls/desks or carry it anywhere for on-the-go access.