Hav, I'm using my UTC since 2017 without any major problems, however, I just want to say that the problem is that I had since day one with the ON / OFF switch, looks like that my unit has some kind of gap or interference between the swtich, if I push all the way forward the ON position the leds don't work, nothing too serious, I just have to manage the switch gently without reaching the other side completely. Apart from that, my unit works flawless.:thumbup: