Chip: EM4102, TK4100, TK4101 COB Frequency: 125KHz Work mode: Read-only Induction distance: 8~20cm Internal serial code: 5 bytes Wipe: >100,000 times Data storage: 10 years Material: ABS, PVC Size: 85.5x54mm Thickness: Karatra ID matevina: 1.8mm Karatra manify mahazatra 0,88mm Karatra manify habe tsy mahazatra: 1.05mm or other specified thickness Working temperature: -20℃ ~ + 80 ℃ (-4℉ ~ + 176 ℉)