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 4xAAA 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. Due to different batches, there may be differences in product appearance, color, and printed text, which will not affect the use. Colour:Black Material:Plastic Package Contents: 1 replicator kit with data cable (accessory color and appearance are random, specified color and appearance are not accepted) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.