This product is not suitable for bank cards! ! 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) Cannot write electronic label stickers and electronic label cards( 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), Weight: 0.49934702343 Pounds, Manufacturer: Tuidzljd