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They typically use a laser-cut 4 mm acrylic plate (sometimes listed as 'acrylic glass') that slots into an LED light base.
Most are USB-powered for low energy use and convenience; listings note they work with power banks, laptops, and USB adapters.
Most models offer around seven color modes, including individual solid colors and a multicolor or automatic color-cycle mode.
Most models use a single one-touch button on the base to switch colors, turn the lamp on/off, or start an automatic color cycle.
Packages commonly include the laser-etched acrylic plate, an LED base, and a USB power cable (often Micro-USB).
They're generally lightweight and portable; since they're USB-powered you can easily move them or use a power bank to take them on trips.
Assembly is minimal: slide the acrylic plate into the LED base, plug in the USB cable, and use the base's one-button control to operate.
