Excellent replacement for the photoelectric cell that my door broke. It looks good with a sturdy construction. It is a rubber gasket to protect against water. The electrical connection accepts a wide range of voltages, so it seems that it works with any standard system. The installation was very easy. I was surprised that he had almost no adjustment, and it started working immediately. The alignment LED is very convenient for this. In summary, I am very happy with my purchase: very good price and good quality.