Reportedly, some of the technologies that can be found in these prototypes include a USB Type-C connector compatible with headsets, wireless charging technology, multi-Force Touch, dual camera configurations, and fingerprint recognition technology embedded within the display. The source claims that Apple is also fiddling with AMOLED display technology, but we should point out that, based on recent reports, the first iPhone to use an AMOLED screen will not be released before 2018.
Apple's testing of various hardware versions for the upcoming iPhone is normal. We've seen leaked prototypes and even case production start on for design that was never released.
One such prototype could be the source of a rumor that Apple will drop the headphone jack on its next generation device.
The iPhone 7 isn't expected until late 2016 but you can follow iClarified on Twitter, Facebook, Google+, or RSS for updates.