A second screen is only useful if you actually carry it. That sounds obvious, but it's the thought everything else grew out of.
The problem with portable monitors
For years, "portable monitor" was a bit of a stretch. The panels did the job, but the whole package was a compromise. Thick, heavy slabs. Resolution that made you squint at fine print. Touch that felt tacked on — if it worked at all. And the cables: one for video, one for power, maybe a dock on top. By the time you'd set it all up, the portability had sort of disappeared.
The insight was simple. A second display only helps if it's actually with you. The moment setup feels like a chore, it stays home.
Start with the body
So the design started with the part everyone else seemed to skip — the chassis. Catsights One is carved from a single block of CNC-machined, aerospace-grade aluminum. No seams, no creaks, nothing that feels cheap in the hand. It's 5.6mm thin and weighs under 510 grams. To put that in perspective, it's lighter than a full water bottle. This isn't a display you lug around reluctantly; it's one you toss in a bag without thinking.
Every part of that is deliberate. If the frame felt heavy or flimsy, the whole idea falls apart — because a "portable" screen you don't want to carry isn't portable at all.
A panel that earns its place
Thin is nice, but thin with a bad screen is just a gimmick. The panel is a 13.3-inch 2560×1600 IPS display — 16:10, 227 pixels per inch. That's retina-class, in the same league as a MacBook Air. 350 nits of brightness, 100% sRGB, 1500:1 contrast. Blacks look black, colors look right, and text stays sharp enough to read all day. And the integrated black design means when the screen's off, it just looks like part of your desk — not another gadget blinking for attention.
The magnetic hub: ports without the bulk
There's a reason thin displays usually have clunky edges: you have to put the ports somewhere. We didn't want to carve the frame full of holes. So the ports live in a separate magnetic hub that snaps onto the back — two USB-C and three USB-A. Want the slimmest carry? Pop the hub off. Need your peripherals? It clicks right back on. The display gets to stay thin, and you still get all the ports you actually use.
Built around the Mac
Catsights One is designed around macOS, and it shows the moment you touch it. The trackpad gestures you already know — one-finger swipe, two-finger zoom, four-finger tile, five-finger dock — work on the display too. It doesn't feel like you're learning a new device. It feels like your Mac grew a second screen.
For people who create
And for the people who draw, there's the USI active pen: 4096 levels of pressure, working in Photoshop and CLIP STUDIO PAINT. Sketching on a display that weighs less than a bag of coffee is a genuinely different feeling — the pen, the canvas, and the color are all right there on your lap.
A second display is only useful if you carry it. So we made one you'd actually want to. Touch the Unknown, Make the Difference.