The card and combination are default empty command products. If testing read and write functions is required, use the replicator to read the complimentary label, then write it to a readable and writable card. Requires 2 AAA 1.5V batteries (not included). Compact size and lightweight (56g), convenient for portable use and on-site copying. The device can copy most common parking cards, access cards, and switch cards available on the market, including small button-type and shaped cards. Can be reused; proximity cards can be used an unlimited number of times. Please note that the product chips come with blank instructions. If writing is required, first read the 125 kHz device instruction, then write it to the corresponding card. Replicator function allows certain one-time copy cards to be duplicated multiple times using the host device. Color: As shown Material: Plastic Package Contents: 1 x Handheld ID Copier 6 x Black T5577 Buckles 6 x T5577 Cards Only the above items are included; other accessories are not included. Note: Lighting effects and display differences may cause slight variations in color between the image and the actual item. Measurement error allowance is +/- 1-3 cm.