Just some no name, gradient, side legend, RGB keycaps from amazon. probably could get those cheeper from aliexpress. brand on the box reads: "kcpmaster"
there are two issues that keep me from recommending this keyboard.
One its a prebuild and the switches and keycaps it comes with arent great (transparent PC caps just sound horrible no matter what you do)
Two the built in battery is too thick so the PCB rests on it ruining the gasket mount on one side, i fixed this by putting in a smaller battery from a gmk67 (had to swap the connector)