When the computer is connected, a disk with software appears. 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 fails to connect, 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 Slight variations in appearance, color, or printed text may occur between batches; these do not affect functionality. Accessories may vary in color and appearance; no specific requests accepted. Includes 5 x CUID cards. Package contents: 1 x Smart Card Reader Kit Other items are not included. Note: Color representation may vary slightly due to lighting and screen settings. Measurement tolerance: ±1–3 cm.