Instructions about how to Write your google review link 1.Dowload "NFC tools" app in Apple store or Google Play Store for Apple store: https://apps.apple.com/us/app/nfc-tools/id1252962749 for Google Play Store https://play.google.com/store/apps/details?id=com.wakdev.wdnfc&hl=en_US&gl=US Chip:NFC215 Frequency:13.56MHz Protocol:14443A Memory:504byte Material:PVC Water-proof Acid-proof Alkali-proof Operating temperature: -40'C to +85'C