Honestly it scans, beep, next

It has a screen and you can click a product to remove it (you need to rescan it)

Other than a time where I could not rescan a product to delete it, it always worked

Also an important note: you can actual see your total on the PDA, and you can manually check prices one by one

You don't have idea how many times they put a price and then you scan it and it's different

(Once I brought home 4x 200g hamburgers for 4 cent )