Portable Monitor OLED Touchscreen 15.6" 4K 60Hz IPS Portable Laptop Monitor, Second Monitor Dual USB C HDMI Computer Display with Speakers & Smart Cover, Travel Monitor for PC Phone PS4/5 Xbox Switch

Pro tip: Most of these unknown-name portable monitors are just laptop panels with an enclosure that accepts external video via HDMI or USB-C DisplayPort alt-mode from China. You can save way way way more money essentially ordering directly from AliExpress. Just do some shopping around and you'll notice they all look identical, except _maybe_ that unknown brand slapped on it. 4K portable monitors like this usually run ~$120, so this is not really a deal. I personally got a 4k OLED with touch for $220 and it's wonderful. And before anyone makes any claims that you can't notice 4k at such a small display size, _some people_ can. And it especially depends on viewing distance and your eyes in general. Personally I love these 4k ~16" displays for a side monitor running Discord or YouTube. The high PPI helps with text. Or you can rotate them to portrait and they may be about the same height as a 27-32" primary monitor, but taking up far less space. I personally like the newer 3840 x 2400 16" displays (16:10 "4k"), or the before-mentioned OLED. They are awesome for setups where you want more high quality screen space in a smaller footprint.

I ordered this one (15.6 OLED touchscreen) a while back: https://www.aliexpress.us/item/3256803924301440.html I am by no means advocating for this specific seller. If you go down the Ali route do a lot of searching, you'll find all these images for literally the same product reposed on tons of product listings. On Amazon you'll find them too for usually ~$500. Not worth it IMO unless you highly value Amazon's returns and domestic fast shipping. The "monitor" itself is awesome. An awesome side monitor for watching steaming video all day as I can just literally tap it to play/pause and easily seek through videos using the touchscreen. Especially when I have my work PC on the other monitors so I don't have to KVM switch back to my main PC to control it.