Chip: Atmel T5577 Memory capacity: 330 bits Working frequency: 125KHz Communication rate: 9600 bonds Read/write time: 0.1 MS Work mode: read only Read distance: 5-8cm Working temperature: -20℃~+55℃ Wipe life: > 100000 times Storage: 10 years Size: 85.6×54×1.8mm Packaging materials: PVC,ABS