The glasses will also pair with iOS and Android phones, the company noted, both in the audio-only format and in the future display version.

The eyewear with the display is meant to be the next step beyond the first generation of audio glasses coming out later this year. The glasses were developed in partnership with Warby Parker, Gentle Monster, and Samsung, blending Google’s technology with their brands’ design aesthetics.

The glasses we tested, meanwhile, were still very much a prototype, although one polished enough to now be tested externally. The reps demoing the XR glasses explained that the prototype allowed Google to not worry about some of the cosmetic details related to different styles and shapes, so it could instead focus on experimenting with the display technology more freely and its impacts on battery life. That means these spectacles are very different from any future shipping version of glasses, in terms of fit, shape, dimensions, and attention to detail. Rather, it’s more like being able to experiment with the “insides” of the glasses, while still in a basic, comfortable frame.

The shipping version of the glasses will be able to detect when the glasses are placed on your head and taken off, but the ones we tried didn’t have this feature.