Parameters Frequency: customized 125KHz/250KHz/375KHz/500KHz Read distance: 2~10cm, depending on the Reader and the application environment Wipe the number: >100,000 times Storage: 10 years Working temperature: -20℃~+80℃ Packaging materials: ABS Size: 43×30×5mm or 50×30×5mm, can be customized Colors: bomvu, luhlaza, luhlaza, lubhelu, mhlophe, njl.