Give it some basis. I am a typographer and a seal maker, this machine is a faithful copy instead of black it is white from the image pack. It is for making seals and easily polymerizing materials such as transparent resins and UV varnishes. For nails, the materials require stronger UV at 100 watts and if the material is dark, you should know that the darker a UV material is, the more difficult it is to polymerize. Even worse, UV materials become fragile like glass if you give excessive radiation. For nails, you need to be able to adjust the intensity and exposure time and experiment with various materials to see how much intensity and time a proper polymerization requires.

For at-home semi-permanent use, it is good. The only negative thing is that you need to apply 2-3 layers of gel in the oven each time.

I bought two. One stopped working the first week. The other is satisfactory for the money I paid