A product I have been looking for for a long time. It is small in size and appears well made. I am told that on power failure it reverts to its previous state when power is recovered - extremely useful especially if like me, you are using the switcher to time/control outside lights via a Hue bridge and you do not want the lights to come back on during daylight hours especially if away on holiday! Any questions were answered very promptly. Very pleased with my purchase.