NADAMOO QR Code Scanner Wireless 2D Barcode Scanner Support Screen Scanning Handheld CMOS Imager Portable USB Bar Code Reader with Auto Sensing, Read 1D 2D QR Code PDF417 for Inventory Library

Q: Does this read the really tiny QR codes that manufactures are now placing on laptops? They are about 1/4"x1/4"

Short answer is, yes. You'll have to setup the scanner to read them. It comes with a booklet that has barcodes in it to help in the setup process. -RANDY

Q: Does this also read the extra 2 and extra 5 digit codes that are on magazines and comic books that list issue number and printing etc...?

Yes , the scanner can read UPC/EAN extra 2 and extra 5 digits barcodes. Scan setting code " Decode UPC/EAN/JAN additional code " or "Adaptive UPC/EAN/JAN additional " on page 17 of user manual. Amber NADAMOO Team