1.smart Card 2.Chip:EM4100 3.Thickness 0.8mm; 4. 125KHZ 5. select ID Number printing or no,or Double-sided color printing smart Card PY-C2Chip: EM 4100working frequency: 125KHZsensitive distance: 8-20cmThickness: 0.8mmselect ID Number printing or no,or Double-sided color printing smart Card number printing, thin PY-C2