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1. High quality pvc material 2. Frequency: 125 KHz 3. Size: 25mm 4.Feature Chip: TK4100 Operating frequency: 125KHZ Reading distance: 1-5CM Reading time: 1-2MS Working temperature: -20 c -85 c Endurance:> 100,000 Data retention:> 10 years Production standards: ISO 14443, ISO 10536 5. Package included: 10pcs 6.We can print logo for you,please contact us to know