The wireless receiver allows the scanner to work up to 100ft. with no wires to get tangled. Charging Cradle with Built-In receiver allows for hands-free scans and charges the scanner at the same time. It's built in usb receiver also makes the scanner completely Plug-n-Play! It'a built in decoder can read the majority of 1D & 2D barcodes and its driver-less operation makes it easy to use with both Windows and Mac operating systems. Easily and instantly read 2-dimensional barcode symbologies such as the most common QR Code, PDF 417 and Data Matrix. The 24IPS motion tolerance and the innovative high pixels CMOS enginge offer fast and accurate scanning results.