Technology parameters Chip: KTP: TK4100, EM4305 IC: China production induction IC chip Operating Frequency: 125kHz, 13.56MHz Induction distance: 2~10cm Work mode: KTP: Read-only IC: R/W Endurance: > 100,000 times Data retention: > 10 years Working temperature: -25℃~+70℃ Material: PVC, pepet, PETG, ABS, Paper Size: L85.5mm×W54mm, thickness 0.80mm or 1.80mm ( 1.80mm thick card with a portable hole )