Review on System Sensor 2W B Photoelectric Detector by Jeremy Flint

I recently found out that smoke detectors only last 10 years and I had to replace the detectors in my 18 year old alarm system. I bought 10 of these detectors and they arrived quickly and in good condition. They were easy to install and started working right away. All green LEDs are flashing confirming they are working on all ten and I have tested them and they are really alarming. I would buy them again if I need more.