Sonoff NFC-Tag

Chip Feature - 215 chip has 540 bytes larger capacity, and can be read and written more than 10,000 times.
Wide Compatible - Compatible with NFC-enabled phones (iOS 13 and above, Android with NFC technology)
Metal Resistant Capacity - Built-in anti-metal layer for use on metal surfaces. laminated white PVC cards with glossy finish and waterproof PVC material, effectively protecting the NFC chip inside.

Easy to Use - Tap the NFC Tag with your phone to turn on the smart devices with ease.
Convenient - You can carry it with ease and use it wherever, or stick it on the wall or desk.