Product Specification: Working frequency: 125KHz + 13.56MHz, dual frequency Chipset: UID&T5577(or em4305) dual chip Read/Write Time:1~2 ms Read Distance: 3 - 10 mm Rewritable: >100,000 times Data Retention: >10 years Features: readable, writable, rewritable, not HID card. Can be used to copy UID code from other card. Material: ABS plastic Color: yellow Quantity: package of 10 pieces Size: 44 * 31 * 3 mm Applications: suitable for access control system of hotel, apartments, school, etc. These keyfobs can be used as backup cards, used to copy or clone same frequency cards.
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