The body harness and head strap had to be as light and unobtrusive as possible too - no mean feat when dogs come in different shapes and sizes, even within breeds.

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The head strap is near-identical and the same leather-look earcups and gold details have been used (including the gnarled housing on the 3.5mm jack) so that from a quick glance, they almost look the same.

ENGADGET: blogger-avatar

The head pad is larger and can be moved to better fit your head, the strap can be adjusted at a number of points and the sliders beneath the 0.7-inch OLED monitors can be adjusted independently from one another.

ENGADGET: Sony HMZ-T2 3D display, heads-in (video) HD