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 and do not press OK. This product is not suitable for bank cards. Cannot write electronic label stickers or electronic label cards (NTAG 213). If the device cannot be connected, do not insert the battery when connecting to the computer. Powered by 4 AAA batteries, standard handset design, easy to carry. Batteries not included. Comes with decoding functionality for preparing various types of smart card access doors. Color: black Material: plastic Style: includes 5x UID keychain How to read and write normal RFID cards: 1. Press the "on/off" button. 2. Place the card on the back of the copier. The copier will display the "Warning" page. Do not press "OK". 3. Place the card on the back side of the copier and press "scan". 4. The copier will scan and display the card number. Due to different production batches, there may be variations in product appearance and printed text. These variations do not affect functionality. Package Contents: 1 x Smart Card Reader Kit (accessories may vary in color and appearance; specific color or appearance cannot be requested) Only the items listed above are included; other items are not included. Note: Lighting effects and monitor settings may cause slight color differences between the image and the actual item. Measurement error allowance is +/- 1-3 cm.