The NADAMOO YHD-8100 is a wired USB laser barcode scanner made for retail checkout, inventory and small business use. It reads standard 1D barcodes like UPC and Code 128 at up to about 260 scans per second, including small, fine barcodes down to 3.3 mil. Use it by hand, or set it in the included adjustable 360° stand for hands free automatic scanning. It plugs into a desktop, laptop or POS computer by USB and works right away with no drivers, batteries or charging. This is a 1D laser scanner; it cannot read QR codes, 2D codes or barcodes on phone screens.