When the computer is connected, a disk with software is displayed. Do not insert the battery when connecting to the computer; wait for the disk to respond. This product is not suitable for bank cards. It cannot write to electronic label stickers or electronic label cards. If the device cannot be connected, do not insert the battery when connecting to the computer. Powered by 4 x AAA batteries (not included); compact and portable design. Supports decoding and direct programming of smart cards for access control systems. How to read and write standard RFID cards: 1. Press the "on/off" button. 2. Place the card on the back of the device. The display shows “page.” 3. Place the card on the back of the device and select “scan.” 4. The device scans and displays the card number. Color: Creamy white Material: Plastic Due to production variations, appearance, color, and printed text may differ slightly between units; this does not affect functionality. Accessories may vary in color and appearance; no specific requests accepted. Specifications: 5 x CUID cards Package contents: 1 x Smart Card Reader Kit Note: Color representation may vary due to screen settings and lighting conditions. Measurement tolerance: ±1–3 cm.