They mostly connected quickly when they first arrived (first connection in seconds with no effort, rest took a few minutes and some work, although I checked them with my Alexa before sending had paired). I was happy! Used several times on the first day with no problems. Woke up the next morning and all 3 I installed the day before said they weren't responding. I've tried EVERYTHING and they just don't work. I downloaded 3 different apps, tried countless times to restore them with Alexa (never found them), they don't transmit Wi-Fi signal so they can't be detected via the Sengled app. I tried the 4th, which I never set initially, and even that didn't work (I thought it would set up as 3 on day 1, but I was wrong). Absolute waste of time and money. So disappointing. i give it back