Looks like it has a clip to attach to the front of a pair of glasses.

Obviously suboptimal, really needs to be integrated into some old-timey welding goggles for the steampunk vibe.

At $349 it’s almost in the range where I’d buy it to play around with but I suspect it’d end up in a drawer like a bunch of other things that looked cool but I never got around to hacking on. Once the technology gets good enough where they can fit it into a regular pair of glasses then we can talk — though looking at this Bluetooth Aftershockz headset I use that day probably isn’t too far off.