The front is white PVC and really thin ferrite sticky back that is 200 Microns. Android, IOS using 11+, Windows, Blackberry, NFC USB / Bluetooth / internal readers/writers. Amazingly simple and very powerful.
Youniker 3 Pack Universal Round Watch Screen Protector Tempered Glass,30MM Round Watch Screen Protector Foils Glass 9H Hardness 0.3MM Slim, Anti-Scratch, Anti-Fingerprint, Bubble Free (30MM)
PATIKIL 30mm Metal Plate for Phone Magnet, 20pcs Round Adhesive 30mm, Silver
PATIKIL 30mm Metal Plate for Phone Magnet, 36pcs Round Adhesive 30mm, Silver
10 WHITE 30mm ANTI METAL NFC Tags Token NTAG213 Waterproof Android Windows HTC
10 ZipNFC 30mm BLACK ANTI METAL ABS NFC Tags Token Disc NTAG213 Android IOS
10 ZipNFC 30mm BLUE ANTI METAL ABS NFC Tags Token Disc NTAG213 Android IOS
