The card and combination are default empty command products. If testing read and write functions is necessary, use the replicator to read the complimentary label, then write it to the readable and writable card. Requires 2 AAA 1.5V batteries (not included). Small size, lightweight (56g), convenient for mobile work and on-site copying. The device can copy most 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 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 features allow certain one-time copy cards to be used multiple times via 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 package content is included; other items are not included. Note: Lighting reflections and different display settings may cause slight color differences between the image and the actual item. Measurement error allowance is +/- 1-3 cm.