System Sensor SYSTEM SENSOR 2W-B System Sensor 2W-B i3 Whi

My house has these installed already by the builder 17 yrs ago. The code says they are good for 10 yrs so I had to bite the bullet and replace them. after calling many local vendors and all of them refused to sell to non-professional client like me, I took a chance and bought from AMZ. The vendor FIRE & SAFETY PLUS returned my inquiry w a mfg date of only 2 months ago do I bought from them despite the price being a little higher. They arrived in about a week and indeed the mfg date was accurate and all 8 detectors worked fine - a blinking green light appeared after installing. Installation was simple since I left the base plate with the wiring in place and simply twisted off each old detector and twisted on the new one. Glad I didn't hire a professional to do this simple task. UPDATE: MAY 2022 We are required to get an inspection from the Fire Dept before selling a house in MA. When the FD arrived and tested some of these detectors, some of them took over a min before the audio signal is activated. Needless to say I did not pass the inspection. After they left, I tested each of the 8 detectors and MOST OF THEM had over a min delay. Only a few activated the audio signal instantly. This is where I really want to praise the vendor I used: Fire and Safety Plus. They were willing to send out 8 new detectors so that I can switch out the defective ones. I received the new badge within 4 days and were able to get 8 working detectors out of all 16. They provided a postage paid sticker so return shipping was free. So I highly recommend this vendor, even if they cost a few bucks more just in case you run into problems like I did.