Attached to tablets, laptops, and smartphones, cordless CHS 8Qi enables one-handed scanning of 1D or 2D barcodes for mobile Point-of-Sale (mPOS), Mobile Ticketing, and other applications. Engine reads barcodes printed on labels or displayed on mobile phone screen, high-density barcodes, poorly printed barcodes, damaged barcodes, and barcodes under shrink wrap. Also, pick list feature allows selective reading of single barcode out of set of codes in close proximity to one another.