... band has to be selected.TAG and RFID reader need to be coordinated to each other ... mmMifare is related to Near Field RFID technology and reading distance.NXP MIFARE Ultralight C ... Soft Tag SurfaceMaterial Glossy paper/PVC / PET/Fabric/Highlight photo paper.etc. HF(13.56Mhz)Square Size 18*18mm,25*25mm,30 ... *38mm,50*50mm,or in customized.HF(13.56Mhz)RoundDiameter:20mm,25mm,26mm,28mm,30mm,35mm, ...