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: 4330×5mm vel 50×30×5mm, can be customized Colors: rubrum, viridi,, caeruleum, flavo, album, etc..