NFC Tags - 5 Anti-Metal PVC Sticker Tags + 1 NFC Keychain + 1 Sheet of 12 Vinyl Waterproof Stickers (Mifare 1K NDEF Formatted) - Android, Windows 8, WP8 Phone Compatible - AT&T Sprint Verizon Wireless - Nokia Samsung Galaxy S3 S2 - Lifetime Guarantee 5 Mifare Classic 1K NDEF Pre-Formatted Anti-Metal NFC Tags (Rigid White PVC - 30mm in Diameter (~quarter sized) with Adhesive Backing) + 1 NFC Keychain FOB (32mm x 52mm) + 1 Sheet of 12 Vinyl Stickers to Differentiate your Tags NFC Chip Type: MIFARE(TM) 1K classic compatible w/ NDEF Formatting already done. Compatible with Tectile. Mifare 1K Memory Size: 1024bytes (1KB), holds vCard, long text. High Quality, Long Lasting (Approx 100,000 Data Read/Write Cycles) Compatible with many Android Phones and/or NFC Readers, including the Samsung Galaxy S3, Samsung Note, LG Optimus G, HTC One Series and any other Mifare compatible NFC phones. Not compatible with Samsung Galaxy S4, Nexus 4, Nexus 10 Operating Frequency: 13.56 MHz - Data Retention: Approximately 10 years. NFC allows for NO BATTERIES REQUIRED