Quiet-Voice Engine

Photographs.4K stills. One press and it is done — no phone to pull out, no lock screen, no app to open.

Recording, and no network for it.It is written to the glasses' own storage and never touches the network. No signal in the mountains, a phone switched off on a plane: it records anyway.

Two microphones, both on the front frame.The main mic sits at the bottom centre of the left rim, port facing down at your mouth, 4–7 centimetres away; the reference mic sits on top of the right rim, port facing up and away from your mouth, much further from it. Which is why you can speak very quietly.

Two speakers.In the temples, near your ears, aimed at the ear canal. Music, podcasts, calls — like any other Bluetooth headset.

It is a pair of glasses first.A TR90 frame in the proportions of ordinary indoor eyewear, UV400 lenses, and any correction you need — myopia, hyperopia, astigmatism. You were going to wear a pair when the sun came out anyway.

One main mic at your mouth, one reference mic facing away.The level difference between them decides. Walking down the street, sitting in a café, in the middle of an online meeting — the result is the same. What was recorded is only you.

You can be very quiet.Quiet enough that someone half a metre away cannot hear you, and it still records you clearly.

Which makes it wrong for meetings.Several people brainstorming, an interview, a lecture: this pair cannot do it, and you should use a voice recorder. That is not a flaw, it is the other side of the same decision.

Online meetings, though, yes.If you want your own half of a meeting kept separately, it is exactly right — what gets recorded is the part you said.

4K stills.There is one action on the glasses: take a photograph. Press when you want one; everything else happens on your phone.

Interval shooting, cut into a sequence.Set it on your phone — one frame every three seconds, say — and it keeps going by itself. What comes back has a rhythm to it, instead of an hour of footage nobody wants to watch twice.

Five-second clips.There for when something has to move. But no long video — that is not what glasses are for.

Why not 4K video.Continuous video will not fit, costs far more power, and shakes the whole time you are walking. Interval stills, aligned on the phone, come out much steadier.

Power draw falls by an order of magnitude.Continuous 4K encoding holds the chip at full load for a long time; interval stills let it drop back into deep sleep between frames.

So the battery can be small.A battery is one of the heaviest single parts in a product like this. Nothing has to be powered through continuous video, so nothing has to be enlarged.

So nothing has to make room for heat.Little heat means no extra thermal structure and no metal parts — the things that take up space and weigh on the scales.

The frame and the lenses are small too.These are the proportions of ordinary indoor eyewear, not a sports wrap. A smaller rim means a smaller lens; and lens weight grows with area far faster than the frame's does.

The child size.Cut for a child's face, narrower at the bridge and at the temples. It takes a prescription just the same — plenty of children already wear glasses.

The adult size.The proportions of ordinary indoor eyewear.

Why this deserves its own section.There are children's watches with cameras, and there are children's devices that record. A pair of glasses a child can use outdoors to catch a flower, a bug, a leaf — with nothing at all depending on a network — has not been made yet.

About a child's privacy.The recording captures the wearer and nobody else, in hardware: what your child says is recorded, what the classmate beside them says is not. That is the same answer for a parent and for a school.

Naming plants and animals in the field.A child sees a plant they do not know and presses once. What comes back is a list of names with pictures.

Picture notes.A line or two with every photograph, spoken or typed. Picture and words together are worth more than either one kept alone.

Time outdoors.An app that does exactly one thing: record how long you were really outside each day.

A food diary.An hour over a meal, twenty frames, and it becomes a food diary by itself — one you can also hand to a health analysis.

Space Gray.It reads more expensive than black, and it is already the colour of the phone and the laptop most people have in front of them.

Light Pink.Not a women's colourway. Warm rather than loud.

Lenses.Clear UV400, Light Red Gold, Light Gray. Tint +¥70, photochromic +¥140, prescription from +¥180.

Indoors.Sunglasses come off when you walk inside. These cannot — you might be mid-call or mid-podcast, and pulling them off ends it. So the lens has to be liveable under a ceiling light, which a dark lens is not.

Outdoors.You still have to look at your phone. A dark lens sends the glasses up onto your forehead every time; a pale one shades your eyes and leaves the screen readable. In strong sun you stop noticing the tint is there at all.

Photochromic.The complete answer to the doorway: clear inside, sunglasses outside, no gesture required. ¥140 more, in either tint.

Not gradient.We asked. The fashion creators were blunt — a gradient lens reads middle-aged. Photochromic is the version of the same idea that does not, because it is not a permanent gradient. It is a clear lens until it is not.

TR90.The nylon that high-end American outdoor eyewear is built from. Very light, very resilient, and it flexes back instead of taking a set. Not the cheap plastic the word "nylon" suggests.

Not titanium.There is a microphone inside the front frame and electronics down both temples. A metal frame with wiring threaded through it is a harder problem for no gain we could find.

Not a sports wrap.Traditional outdoor eyewear is thick, wide and heavy, and a wide frame forces a wide lens — which is where the weight actually accumulates. We used the proportions of an ordinary indoor frame instead. Smaller rim, smaller lens, weight saved at the source.

Mainland China.Free shipping nationwide, with no packaging or handling fee.

One pair at a time.Many of these lenses are cut to one person's own prescription, and a pair ships once it is made. That is not an efficiency problem; it is what the optical trade has always been.

Everywhere else.Not yet. Every market needs its own radio certification, and a warehouse on the ground abroad. We would rather do one place properly first.