tipe chip: Atmel T5567/T5577 Storage capacity: 330bits Operating frequency: 125KHz Communication speed: 9600bonds Reading distance: 3~10cm Read/write time: 67ms Operating temperature: -20℃~+55℃ Endurance: > 100,000 times Data Protection: > 10 years Size: 86×54×0.84mm or customer specified dimensions, can also be made into non-standard shapes, or key chain. material: PVC / pepet / PETG / ABS, 0.13mm copper wire Packaging process: PVC laminated