Panels make some strident noise depending of the color selected.
For example i have noise with green but nothing when set on pink.

Also the way to control with the app seems to work only by wifi. Meaning i have to disconnect my phone or tablet from my main wifi to connect it to the triangle non secure wifi each time in need to control it.
But it disconnects my devices from internet.
I can't do both at the same time.
Also, when not used since a day, i have to reset the light so i can find it again on my wifi device networks available.

Everything works perfect. Installation is very simple and user experience also.
For me, the best LED panels 💪

Besten LED Panelen die ich bisher hatte, selbst wenn sie ausgeschaltet sind sind das echt Mega die Hingucker bei einer weißen Wand!

I love them they work perfectly

The Ultra Black Triangles are very cool and class.