When the computer is connected, a disk is displayed with software on it. Do not insert the battery when connecting to the computer; wait for the disk to respond before proceeding. This product is not suitable for bank cards. It cannot write 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 preparation of various smart card access door systems. How to read and write standard RFID cards: 1. Press the "on/off" button. 2. Place the card on the back of the reader. The reader will display the “page” screen. 3. Place the card on the back of the reader and select “scan.” 4. The reader scans and displays the card number. Color: Creamy white Material: Plastic Due to variations between production batches, there may be slight differences in appearance, color, or printed text—these do not affect functionality. Accessories may vary in color and appearance; no specific color or style requests accepted. Specifications: Includes 5 x UID cards Package contents: 1 x Smart Card Reader Kit Note: Light reflection and display differences may cause slight color variation between the image and the actual product. Measurement tolerance is ±1–3 cm.