When the computer is connected, a disk is displayed with software on it(Do not put the battery in when connecting the computer, wait for the disk to respond, do not press ok) This product is not suitable for bank cards! ! Cannot write electronic label stickers and electronic label cards(NTAG 213) If the device cannot be connected, please do not put the battery when connecting to the computer Working with 4 x AAA battery, standard handset, easy to carry. (not included) Comes decoding, direct preparation of various types of smart card access door. How to read and write normal RFID cards? 1. Press the "on/off " button. 2. Put the cards on the back of the copier. The copier will be show the "Waring" page. Press "ok" 3. Put the cards on the back side of the copier and press "scan" 4. The copier will scan and show the card number. Color:Creamy white Material: Plastic Due to different batches, there may be differences in product appearance, color, and printed text, which will not affect the use. Accessories have random colors and appearances, No specifications accepted Specifications: 5X CUID Keychain Package contents: 1 x Smart Card Reader Kit