It never blinked to try synchronization, no matter how many times I turned it off and on or screwed it, absolutely nothing... Also, from what I understood without being sure because I never managed to test it, it probably only works with 2.4 wifi, as requested by the application...

Just got it and I am very satisfied.

Positive:

- Very easy setup
- Easy application
- You can toggle the switch, and it turns on with the previous setting every time it is turned off
- Very fast connection to the mobile phone on every switch on (a few seconds after turning on the switch)
- The white is very bright, I don't even have it at 100%

Negative:

- It makes a very slight electric noise (if you put your ear close, you will hear it, but it is imperceptible)
- I would like it to have a default state setting

Unbelievable Value for Money. The app is extremely easy to use, it also has smart programs to automatically turn on the lamp based on the time you set, or to turn it off, to create groups of lamps (although I haven't checked it), and in general, I have enjoyed it a lot! In a 7 square meter room, it can be used as almost the main source of lighting!