Metalique manufacturing, solid, and quiet. The price / quality ratio is very correct, bubble production is very abundant with the use of a GOOD product bubbles. in the external use is essential !!! otherwise the ice !!!! tray filled autonomy is about 30/45 minutes, so it's going very fast! it is the equivalent product on the floor !!! (To know) There are bubbles in the liquid that reagisent black light (very pretty, yellow bubbles, but watch the product a little spot!) Cons: no adjustments.