Usage Tips:Compatible for use as clone cards with Switch, U and .Built with high quality & durable waterproof PVC material,each NFC card with opp bag individual packing.Blank white both side - printable by most photo ID card printers like , , , , , Nisca, NBS & etc. NOT use for inkjet printers.504 bytes usable memory, programmable with all NFC-enabled smartphones or devices. Note: Some Models can not support reading the NFC cards, so it can not recognizes the NFC cards, it is not cards problem, understand it clearly your buying.Colour:WhiteMaterial:PVCSize:One piece about 85.5*5.4mmPackage Contents:30*NFC CardsOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.