The card and combination are default empty command products. For testing read and write functions, use the replicator to read the complimentary label, then write it to a readable and writable card. Requires two 1.5V AAA batteries (not included). Compact size and lightweight (56g), convenient for portable use and on-site copying. This device can copy most common market cards, including parking cards, access cards, switch cards, small button-type cards, and shaped cards. Cards can be reused; proximity cards support unlimited usage. Please note that product chips come with blank instructions by default. If writing is required, first read the 125 kHz device instruction, then write data to the corresponding card. The replicator has advanced functionality, enabling repeated use of certain one-time copy cards through the host device. Color: As shown Material: Plastic Package Contents: 1 x Handheld ID Copier 6 x Black T5577 Buckles 6 x T5577 Cards Note: The package includes only the items listed above. Other accessories or products are not included. Lighting and display differences may cause slight color variations between the image and the actual item. Measurement error allowance: +/- 1-3 cm.