I bought this ripple projector from Banggood to check out. It claims to be 10W but as many of these items turn out, it isn’t by a long chalk.
That said, the effect is very good and rather annoyingly it outperforms an actual 10W professional unit!
The inside is clearly just a medley of random components from other products including the front lens of a disco lamp, the motor possibly from the same a very common 3W power supply and the case from a typical laser type unit.
These seem to be available in various fixed colours with a remote multicolour one available too.
Here’s the Banggood page I bought this one from:-
And here’s a typical ebay.com search for similar items:-
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