Ordered this as we like to sleep later than the chickens. This came in quickly, easy to put in, doesn’t take much time. The wire on the sensor was not tightened down with screw very well so when it did not work initially, hubby backtracked to find the issue, tightened the screw & wire down and viola! We had power to the sensor. I walked out to the chicken house tonight just to check to see if the thing worked properly and yes! It does work. All chickens were inside & settled! So thankful I came across this on amazon. DH had no intention of opening the chicken house door every morning the rest of our years together. Thank you!