I have 2 of the drippers. You can expect about 4daysfrom the dripper. I does just as it states. When the temp goes up in the morning it begins to drip. When the temp reaches it's warmest point and begins to cool it stops. They say the temp needs to go up 10 degrees before it will begin to drip, so on days where the temp increase is a lot, say 30degrees,it will drip alot.