[WindowsCentral.com]

The Elite x3 is a phone for business, according to HP, and the addition of a new barcode scanner case unveiled at Mobile World Congress (MWC) 2017 expands the feature set for businesses. It's a simple accessory built on the legacy of decades of barcode scanners, and it brings that old-school tech to a decidedly new-school format.
The unit essentially consists of two parts: a case that attaches to the Elite x3 and connects to the five pogo pins on the lower back, and a pop-on scanner module that sits near the top with a cut-out for the phone's rear camera and fingerprint scanner.

Full story from the WindowsCentral blog...